Fix placement of auxiliary IM window for Core Text

[MacVim.git] / src / gui_w32.c

/* vi:set ts=8 sts=4 sw=4:
 *
 * VIM - Vi IMproved            by Bram Moolenaar
 *                              GUI support by Robert Webb
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */
/*
 * Windows GUI.
 *
 * GUI support for Microsoft Windows.  Win32 initially; maybe Win16 later
 *
 * George V. Reilly <george@reilly.org> wrote the original Win32 GUI.
 * Robert Webb reworked it to use the existing GUI stuff and added menu,
 * scrollbars, etc.
 *
 * Note: Clipboard stuff, for cutting and pasting text to other windows, is in
 * os_win32.c.  (It can also be done from the terminal version).
 *
 * TODO: Some of the function signatures ought to be updated for Win64;
 * e.g., replace LONG with LONG_PTR, etc.
 */

#include "vim.h"

/*
 * These are new in Windows ME/XP, only defined in recent compilers.
 */
#ifndef HANDLE_WM_XBUTTONUP
# define HANDLE_WM_XBUTTONUP(hwnd, wParam, lParam, fn) \
   ((fn)((hwnd), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
#endif
#ifndef HANDLE_WM_XBUTTONDOWN
# define HANDLE_WM_XBUTTONDOWN(hwnd, wParam, lParam, fn) \
   ((fn)((hwnd), FALSE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
#endif
#ifndef HANDLE_WM_XBUTTONDBLCLK
# define HANDLE_WM_XBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
   ((fn)((hwnd), TRUE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
#endif

/*
 * Include the common stuff for MS-Windows GUI.
 */
#include "gui_w48.c"

#ifdef FEAT_XPM_W32
# include "xpm_w32.h"
#endif

#ifdef PROTO
# define WINAPI
#endif

#ifdef __MINGW32__
/*
 * Add a lot of missing defines.
 * They are not always missing, we need the #ifndef's.
 */
# ifndef _cdecl
#  define _cdecl
# endif
# ifndef IsMinimized
#  define     IsMinimized(hwnd)         IsIconic(hwnd)
# endif
# ifndef IsMaximized
#  define     IsMaximized(hwnd)         IsZoomed(hwnd)
# endif
# ifndef SelectFont
#  define     SelectFont(hdc, hfont)  ((HFONT)SelectObject((hdc), (HGDIOBJ)(HFONT)(hfont)))
# endif
# ifndef GetStockBrush
#  define     GetStockBrush(i)     ((HBRUSH)GetStockObject(i))
# endif
# ifndef DeleteBrush
#  define     DeleteBrush(hbr)     DeleteObject((HGDIOBJ)(HBRUSH)(hbr))
# endif

# ifndef HANDLE_WM_RBUTTONDBLCLK
#  define HANDLE_WM_RBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_MBUTTONUP
#  define HANDLE_WM_MBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_MBUTTONDBLCLK
#  define HANDLE_WM_MBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_LBUTTONDBLCLK
#  define HANDLE_WM_LBUTTONDBLCLK(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), TRUE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_RBUTTONDOWN
#  define HANDLE_WM_RBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_MOUSEMOVE
#  define HANDLE_WM_MOUSEMOVE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_RBUTTONUP
#  define HANDLE_WM_RBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_MBUTTONDOWN
#  define HANDLE_WM_MBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_LBUTTONUP
#  define HANDLE_WM_LBUTTONUP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_LBUTTONDOWN
#  define HANDLE_WM_LBUTTONDOWN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), FALSE, (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam), (UINT)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_SYSCHAR
#  define HANDLE_WM_SYSCHAR(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (TCHAR)(wParam), (int)(short)LOWORD(lParam)), 0L)
# endif
# ifndef HANDLE_WM_ACTIVATEAPP
#  define HANDLE_WM_ACTIVATEAPP(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (BOOL)(wParam), (DWORD)(lParam)), 0L)
# endif
# ifndef HANDLE_WM_WINDOWPOSCHANGING
#  define HANDLE_WM_WINDOWPOSCHANGING(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(BOOL)(fn)((hwnd), (LPWINDOWPOS)(lParam))
# endif
# ifndef HANDLE_WM_VSCROLL
#  define HANDLE_WM_VSCROLL(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(lParam), (UINT)(LOWORD(wParam)),  (int)(short)HIWORD(wParam)), 0L)
# endif
# ifndef HANDLE_WM_SETFOCUS
#  define HANDLE_WM_SETFOCUS(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_KILLFOCUS
#  define HANDLE_WM_KILLFOCUS(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_HSCROLL
#  define HANDLE_WM_HSCROLL(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(lParam), (UINT)(LOWORD(wParam)), (int)(short)HIWORD(wParam)), 0L)
# endif
# ifndef HANDLE_WM_DROPFILES
#  define HANDLE_WM_DROPFILES(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HDROP)(wParam)), 0L)
# endif
# ifndef HANDLE_WM_CHAR
#  define HANDLE_WM_CHAR(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (TCHAR)(wParam), (int)(short)LOWORD(lParam)), 0L)
# endif
# ifndef HANDLE_WM_SYSDEADCHAR
#  define HANDLE_WM_SYSDEADCHAR(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (TCHAR)(wParam), (int)(short)LOWORD(lParam)), 0L)
# endif
# ifndef HANDLE_WM_DEADCHAR
#  define HANDLE_WM_DEADCHAR(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (TCHAR)(wParam), (int)(short)LOWORD(lParam)), 0L)
# endif
#endif /* __MINGW32__ */


/* Some parameters for tearoff menus.  All in pixels. */
#define TEAROFF_PADDING_X       2
#define TEAROFF_BUTTON_PAD_X    8
#define TEAROFF_MIN_WIDTH       200
#define TEAROFF_SUBMENU_LABEL   ">>"
#define TEAROFF_COLUMN_PADDING  3       // # spaces to pad column with.


/* For the Intellimouse: */
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL   0x20a
#endif


#ifdef FEAT_BEVAL
# define ID_BEVAL_TOOLTIP   200
# define BEVAL_TEXT_LEN     MAXPATHL

#if _MSC_VER < 1300
/* Work around old versions of basetsd.h which wrongly declares
 * UINT_PTR as unsigned long. */
# define UINT_PTR UINT
#endif

static void make_tooltip __ARGS((BalloonEval *beval, char *text, POINT pt));
static void delete_tooltip __ARGS((BalloonEval *beval));
static VOID CALLBACK BevalTimerProc __ARGS((HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime));

static BalloonEval  *cur_beval = NULL;
static UINT_PTR     BevalTimerId = 0;
static DWORD        LastActivity = 0;

/*
 * excerpts from headers since this may not be presented
 * in the extremely old compilers
 */
#include <pshpack1.h>

typedef struct _DllVersionInfo
{
    DWORD cbSize;
    DWORD dwMajorVersion;
    DWORD dwMinorVersion;
    DWORD dwBuildNumber;
    DWORD dwPlatformID;
} DLLVERSIONINFO;

#include <poppack.h>

typedef struct tagTOOLINFOA_NEW
{
        UINT cbSize;
        UINT uFlags;
        HWND hwnd;
        UINT_PTR uId;
        RECT rect;
        HINSTANCE hinst;
        LPSTR lpszText;
        LPARAM lParam;
} TOOLINFO_NEW;

typedef struct tagNMTTDISPINFO_NEW
{
    NMHDR      hdr;
    LPSTR      lpszText;
    char       szText[80];
    HINSTANCE  hinst;
    UINT       uFlags;
    LPARAM     lParam;
} NMTTDISPINFO_NEW;

typedef HRESULT (WINAPI* DLLGETVERSIONPROC)(DLLVERSIONINFO *);
#ifndef TTM_SETMAXTIPWIDTH
# define TTM_SETMAXTIPWIDTH     (WM_USER+24)
#endif

#ifndef TTF_DI_SETITEM
# define TTF_DI_SETITEM         0x8000
#endif

#ifndef TTN_GETDISPINFO
# define TTN_GETDISPINFO        (TTN_FIRST - 0)
#endif

#endif /* defined(FEAT_BEVAL) */

#if defined(FEAT_TOOLBAR) || defined(FEAT_GUI_TABLINE)
/* Older MSVC compilers don't have LPNMTTDISPINFO[AW] thus we need to define
 * it here if LPNMTTDISPINFO isn't defined.
 * MingW doesn't define LPNMTTDISPINFO but typedefs it.  Thus we need to check
 * _MSC_VER. */
# if !defined(LPNMTTDISPINFO) && defined(_MSC_VER)
typedef struct tagNMTTDISPINFOA {
    NMHDR       hdr;
    LPSTR       lpszText;
    char        szText[80];
    HINSTANCE   hinst;
    UINT        uFlags;
    LPARAM      lParam;
} NMTTDISPINFOA, *LPNMTTDISPINFOA;
#  define LPNMTTDISPINFO LPNMTTDISPINFOA

#  ifdef FEAT_MBYTE
typedef struct tagNMTTDISPINFOW {
    NMHDR       hdr;
    LPWSTR      lpszText;
    WCHAR       szText[80];
    HINSTANCE   hinst;
    UINT        uFlags;
    LPARAM      lParam;
} NMTTDISPINFOW, *LPNMTTDISPINFOW;
#  endif
# endif
#endif

#ifndef TTN_GETDISPINFOW
# define TTN_GETDISPINFOW       (TTN_FIRST - 10)
#endif

/* Local variables: */

#ifdef FEAT_MENU
static UINT     s_menu_id = 100;

/*
 * Use the system font for dialogs and tear-off menus.  Remove this line to
 * use DLG_FONT_NAME.
 */
# define USE_SYSMENU_FONT
#endif

#define VIM_NAME        "vim"
#define VIM_CLASS       "Vim"
#define VIM_CLASSW      L"Vim"

/* Initial size for the dialog template.  For gui_mch_dialog() it's fixed,
 * thus there should be room for every dialog.  For tearoffs it's made bigger
 * when needed. */
#define DLG_ALLOC_SIZE 16 * 1024

/*
 * stuff for dialogs, menus, tearoffs etc.
 */
static LRESULT APIENTRY dialog_callback(HWND, UINT, WPARAM, LPARAM);
static LRESULT APIENTRY tearoff_callback(HWND, UINT, WPARAM, LPARAM);
static PWORD
add_dialog_element(
        PWORD p,
        DWORD lStyle,
        WORD x,
        WORD y,
        WORD w,
        WORD h,
        WORD Id,
        WORD clss,
        const char *caption);
static LPWORD lpwAlign(LPWORD);
static int nCopyAnsiToWideChar(LPWORD, LPSTR);
static void gui_mch_tearoff(char_u *title, vimmenu_T *menu, int initX, int initY);
static void get_dialog_font_metrics(void);

static int dialog_default_button = -1;

/* Intellimouse support */
static int mouse_scroll_lines = 0;
static UINT msh_msgmousewheel = 0;

static int      s_usenewlook;       /* emulate W95/NT4 non-bold dialogs */
#ifdef FEAT_TOOLBAR
static void initialise_toolbar(void);
static int get_toolbar_bitmap(vimmenu_T *menu);
#endif

#ifdef FEAT_GUI_TABLINE
static void initialise_tabline(void);
#endif

#ifdef FEAT_MBYTE_IME
static LRESULT _OnImeComposition(HWND hwnd, WPARAM dbcs, LPARAM param);
static char_u *GetResultStr(HWND hwnd, int GCS, int *lenp);
#endif
#if defined(FEAT_MBYTE_IME) && defined(DYNAMIC_IME)
# ifdef NOIME
typedef struct tagCOMPOSITIONFORM {
    DWORD dwStyle;
    POINT ptCurrentPos;
    RECT  rcArea;
} COMPOSITIONFORM, *PCOMPOSITIONFORM, NEAR *NPCOMPOSITIONFORM, FAR *LPCOMPOSITIONFORM;
typedef HANDLE HIMC;
# endif

static HINSTANCE hLibImm = NULL;
static LONG (WINAPI *pImmGetCompositionStringA)(HIMC, DWORD, LPVOID, DWORD);
static LONG (WINAPI *pImmGetCompositionStringW)(HIMC, DWORD, LPVOID, DWORD);
static HIMC (WINAPI *pImmGetContext)(HWND);
static HIMC (WINAPI *pImmAssociateContext)(HWND, HIMC);
static BOOL (WINAPI *pImmReleaseContext)(HWND, HIMC);
static BOOL (WINAPI *pImmGetOpenStatus)(HIMC);
static BOOL (WINAPI *pImmSetOpenStatus)(HIMC, BOOL);
static BOOL (WINAPI *pImmGetCompositionFont)(HIMC, LPLOGFONTA);
static BOOL (WINAPI *pImmSetCompositionFont)(HIMC, LPLOGFONTA);
static BOOL (WINAPI *pImmSetCompositionWindow)(HIMC, LPCOMPOSITIONFORM);
static BOOL (WINAPI *pImmGetConversionStatus)(HIMC, LPDWORD, LPDWORD);
static BOOL (WINAPI *pImmSetConversionStatus)(HIMC, DWORD, DWORD);
static void dyn_imm_load(void);
#else
# define pImmGetCompositionStringA ImmGetCompositionStringA
# define pImmGetCompositionStringW ImmGetCompositionStringW
# define pImmGetContext           ImmGetContext
# define pImmAssociateContext     ImmAssociateContext
# define pImmReleaseContext       ImmReleaseContext
# define pImmGetOpenStatus        ImmGetOpenStatus
# define pImmSetOpenStatus        ImmSetOpenStatus
# define pImmGetCompositionFont   ImmGetCompositionFontA
# define pImmSetCompositionFont   ImmSetCompositionFontA
# define pImmSetCompositionWindow ImmSetCompositionWindow
# define pImmGetConversionStatus  ImmGetConversionStatus
# define pImmSetConversionStatus  ImmSetConversionStatus
#endif

#ifndef ETO_IGNORELANGUAGE
# define ETO_IGNORELANGUAGE  0x1000
#endif

/* multi monitor support */
typedef struct _MONITORINFOstruct
{
    DWORD cbSize;
    RECT rcMonitor;
    RECT rcWork;
    DWORD dwFlags;
} _MONITORINFO;

typedef HANDLE _HMONITOR;
typedef _HMONITOR (WINAPI *TMonitorFromWindow)(HWND, DWORD);
typedef BOOL (WINAPI *TGetMonitorInfo)(_HMONITOR, _MONITORINFO *);

static TMonitorFromWindow   pMonitorFromWindow = NULL;
static TGetMonitorInfo      pGetMonitorInfo = NULL;
static HANDLE               user32_lib = NULL;
#ifdef FEAT_NETBEANS_INTG
int WSInitialized = FALSE; /* WinSock is initialized */
#endif
/*
 * Return TRUE when running under Windows NT 3.x or Win32s, both of which have
 * less fancy GUI APIs.
 */
    static int
is_winnt_3(void)
{
    return ((os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                && os_version.dwMajorVersion == 3)
            || (os_version.dwPlatformId == VER_PLATFORM_WIN32s));
}

/*
 * Return TRUE when running under Win32s.
 */
    int
gui_is_win32s(void)
{
    return (os_version.dwPlatformId == VER_PLATFORM_WIN32s);
}

#ifdef FEAT_MENU
/*
 * Figure out how high the menu bar is at the moment.
 */
    static int
gui_mswin_get_menu_height(
    int     fix_window)     /* If TRUE, resize window if menu height changed */
{
    static int  old_menu_height = -1;

    RECT    rc1, rc2;
    int     num;
    int     menu_height;

    if (gui.menu_is_active)
        num = GetMenuItemCount(s_menuBar);
    else
        num = 0;

    if (num == 0)
        menu_height = 0;
    else
    {
        if (is_winnt_3())       /* for NT 3.xx */
        {
            if (gui.starting)
                menu_height = GetSystemMetrics(SM_CYMENU);
            else
            {
                RECT r1, r2;
                int frameht = GetSystemMetrics(SM_CYFRAME);
                int capht = GetSystemMetrics(SM_CYCAPTION);

                /* get window rect of s_hwnd
                 * get client rect of s_hwnd
                 * get cap height
                 * subtract from window rect, the sum of client height,
                 * (if not maximized)frame thickness, and caption height.
                 */
                GetWindowRect(s_hwnd, &r1);
                GetClientRect(s_hwnd, &r2);
                menu_height = r1.bottom - r1.top - (r2.bottom - r2.top
                                 + 2 * frameht * (!IsZoomed(s_hwnd)) + capht);
            }
        }
        else                    /* win95 and variants (NT 4.0, I guess) */
        {
            /*
             * In case 'lines' is set in _vimrc/_gvimrc window width doesn't
             * seem to have been set yet, so menu wraps in default window
             * width which is very narrow.  Instead just return height of a
             * single menu item.  Will still be wrong when the menu really
             * should wrap over more than one line.
             */
            GetMenuItemRect(s_hwnd, s_menuBar, 0, &rc1);
            if (gui.starting)
                menu_height = rc1.bottom - rc1.top + 1;
            else
            {
                GetMenuItemRect(s_hwnd, s_menuBar, num - 1, &rc2);
                menu_height = rc2.bottom - rc1.top + 1;
            }
        }
    }

    if (fix_window && menu_height != old_menu_height)
    {
        old_menu_height = menu_height;
        gui_set_shellsize(FALSE, FALSE, RESIZE_VERT);
    }

    return menu_height;
}
#endif /*FEAT_MENU*/


/*
 * Setup for the Intellimouse
 */
    static void
init_mouse_wheel(void)
{

#ifndef SPI_GETWHEELSCROLLLINES
# define SPI_GETWHEELSCROLLLINES    104
#endif
#ifndef SPI_SETWHEELSCROLLLINES
# define SPI_SETWHEELSCROLLLINES    105
#endif

#define VMOUSEZ_CLASSNAME  "MouseZ"             /* hidden wheel window class */
#define VMOUSEZ_TITLE      "Magellan MSWHEEL"   /* hidden wheel window title */
#define VMSH_MOUSEWHEEL    "MSWHEEL_ROLLMSG"
#define VMSH_SCROLL_LINES  "MSH_SCROLL_LINES_MSG"

    HWND hdl_mswheel;
    UINT msh_msgscrolllines;

    msh_msgmousewheel = 0;
    mouse_scroll_lines = 3;     /* reasonable default */

    if ((os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                && os_version.dwMajorVersion >= 4)
            || (os_version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS
                && ((os_version.dwMajorVersion == 4
                        && os_version.dwMinorVersion >= 10)
                    || os_version.dwMajorVersion >= 5)))
    {
        /* if NT 4.0+ (or Win98) get scroll lines directly from system */
        SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0,
                &mouse_scroll_lines, 0);
    }
    else if (os_version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS
            || (os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                && os_version.dwMajorVersion < 4))
    {   /*
         * If Win95 or NT 3.51,
         * try to find the hidden point32 window.
         */
        hdl_mswheel = FindWindow(VMOUSEZ_CLASSNAME, VMOUSEZ_TITLE);
        if (hdl_mswheel)
        {
            msh_msgscrolllines = RegisterWindowMessage(VMSH_SCROLL_LINES);
            if (msh_msgscrolllines)
            {
                mouse_scroll_lines = (int)SendMessage(hdl_mswheel,
                        msh_msgscrolllines, 0, 0);
                msh_msgmousewheel  = RegisterWindowMessage(VMSH_MOUSEWHEEL);
            }
        }
    }
}


/* Intellimouse wheel handler */
    static void
_OnMouseWheel(
    HWND hwnd,
    short zDelta)
{
/* Treat a mouse wheel event as if it were a scroll request */
    int i;
    int size;
    HWND hwndCtl;

    if (curwin->w_scrollbars[SBAR_RIGHT].id != 0)
    {
        hwndCtl = curwin->w_scrollbars[SBAR_RIGHT].id;
        size = curwin->w_scrollbars[SBAR_RIGHT].size;
    }
    else if (curwin->w_scrollbars[SBAR_LEFT].id != 0)
    {
        hwndCtl = curwin->w_scrollbars[SBAR_LEFT].id;
        size = curwin->w_scrollbars[SBAR_LEFT].size;
    }
    else
        return;

    size = curwin->w_height;
    if (mouse_scroll_lines == 0)
        init_mouse_wheel();

    if (mouse_scroll_lines > 0
            && mouse_scroll_lines < (size > 2 ? size - 2 : 1))
    {
        for (i = mouse_scroll_lines; i > 0; --i)
            _OnScroll(hwnd, hwndCtl, zDelta >= 0 ? SB_LINEUP : SB_LINEDOWN, 0);
    }
    else
        _OnScroll(hwnd, hwndCtl, zDelta >= 0 ? SB_PAGEUP : SB_PAGEDOWN, 0);
}

#ifdef USE_SYSMENU_FONT
/*
 * Get Menu Font.
 * Return OK or FAIL.
 */
    static int
gui_w32_get_menu_font(LOGFONT *lf)
{
    NONCLIENTMETRICS nm;

    nm.cbSize = sizeof(NONCLIENTMETRICS);
    if (!SystemParametersInfo(
            SPI_GETNONCLIENTMETRICS,
            sizeof(NONCLIENTMETRICS),
            &nm,
            0))
        return FAIL;
    *lf = nm.lfMenuFont;
    return OK;
}
#endif


#if defined(FEAT_GUI_TABLINE) && defined(USE_SYSMENU_FONT)
/*
 * Set the GUI tabline font to the system menu font
 */
    static void
set_tabline_font(void)
{
    LOGFONT     lfSysmenu;
    HFONT       font;
    HWND        hwnd;
    HDC         hdc;
    HFONT       hfntOld;
    TEXTMETRIC  tm;

    if (gui_w32_get_menu_font(&lfSysmenu) != OK)
        return;

    font = CreateFontIndirect(&lfSysmenu);

    SendMessage(s_tabhwnd, WM_SETFONT, (WPARAM)font, TRUE);

    /*
     * Compute the height of the font used for the tab text
     */
    hwnd = GetDesktopWindow();
    hdc = GetWindowDC(hwnd);
    hfntOld = SelectFont(hdc, font);

    GetTextMetrics(hdc, &tm);

    SelectFont(hdc, hfntOld);
    ReleaseDC(hwnd, hdc);

    /*
     * The space used by the tab border and the space between the tab label
     * and the tab border is included as 7.
     */
    gui.tabline_height = tm.tmHeight + tm.tmInternalLeading + 7;
}
#endif

/*
 * Invoked when a setting was changed.
 */
    static LRESULT CALLBACK
_OnSettingChange(UINT n)
{
    if (n == SPI_SETWHEELSCROLLLINES)
        SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0,
                &mouse_scroll_lines, 0);
#if defined(FEAT_GUI_TABLINE) && defined(USE_SYSMENU_FONT)
    if (n == SPI_SETNONCLIENTMETRICS)
        set_tabline_font();
#endif
    return 0;
}

#if 0   /* disabled, a gap appears below and beside the window, and the window
           can be moved (in a strange way) */
/*
 * Even though we have _DuringSizing() which makes the rubber band a valid
 * size, we need this for when the user maximises the window.
 * TODO: Doesn't seem to adjust the width though for some reason.
 */
    static BOOL
_OnWindowPosChanging(
    HWND hwnd,
    LPWINDOWPOS lpwpos)
{
    RECT    workarea_rect;

    if (!(lpwpos->flags & SWP_NOSIZE))
    {
        if (IsMaximized(hwnd)
                && (os_version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS
                    || (os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                        && os_version.dwMajorVersion >= 4)))
        {
            SystemParametersInfo(SPI_GETWORKAREA, 0, &workarea_rect, 0);
            lpwpos->x = workarea_rect.left;
            lpwpos->y = workarea_rect.top;
            lpwpos->cx = workarea_rect.right - workarea_rect.left;
            lpwpos->cy = workarea_rect.bottom - workarea_rect.top;
        }
        gui_mswin_get_valid_dimensions(lpwpos->cx, lpwpos->cy,
                                     &lpwpos->cx, &lpwpos->cy);
    }
    return 0;
}
#endif

#ifdef FEAT_NETBEANS_INTG
    static void
_OnWindowPosChanged(
    HWND hwnd,
    const LPWINDOWPOS lpwpos)
{
    static int x = 0, y = 0, cx = 0, cy = 0;

    if (WSInitialized && (lpwpos->x != x || lpwpos->y != y
                                     || lpwpos->cx != cx || lpwpos->cy != cy))
    {
        x = lpwpos->x;
        y = lpwpos->y;
        cx = lpwpos->cx;
        cy = lpwpos->cy;
        netbeans_frame_moved(x, y);
    }
    /* Allow to send WM_SIZE and WM_MOVE */
    FORWARD_WM_WINDOWPOSCHANGED(hwnd, lpwpos, MyWindowProc);
}
#endif

    static int
_DuringSizing(
    UINT fwSide,
    LPRECT lprc)
{
    int     w, h;
    int     valid_w, valid_h;
    int     w_offset, h_offset;

    w = lprc->right - lprc->left;
    h = lprc->bottom - lprc->top;
    gui_mswin_get_valid_dimensions(w, h, &valid_w, &valid_h);
    w_offset = w - valid_w;
    h_offset = h - valid_h;

    if (fwSide == WMSZ_LEFT || fwSide == WMSZ_TOPLEFT
                            || fwSide == WMSZ_BOTTOMLEFT)
        lprc->left += w_offset;
    else if (fwSide == WMSZ_RIGHT || fwSide == WMSZ_TOPRIGHT
                            || fwSide == WMSZ_BOTTOMRIGHT)
        lprc->right -= w_offset;

    if (fwSide == WMSZ_TOP || fwSide == WMSZ_TOPLEFT
                            || fwSide == WMSZ_TOPRIGHT)
        lprc->top += h_offset;
    else if (fwSide == WMSZ_BOTTOM || fwSide == WMSZ_BOTTOMLEFT
                            || fwSide == WMSZ_BOTTOMRIGHT)
        lprc->bottom -= h_offset;
    return TRUE;
}



    static LRESULT CALLBACK
_WndProc(
    HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam)
{
    /*
    TRACE("WndProc: hwnd = %08x, msg = %x, wParam = %x, lParam = %x\n",
          hwnd, uMsg, wParam, lParam);
    */

    HandleMouseHide(uMsg, lParam);

    s_uMsg = uMsg;
    s_wParam = wParam;
    s_lParam = lParam;

    switch (uMsg)
    {
        HANDLE_MSG(hwnd, WM_DEADCHAR,   _OnDeadChar);
        HANDLE_MSG(hwnd, WM_SYSDEADCHAR, _OnDeadChar);
        /* HANDLE_MSG(hwnd, WM_ACTIVATE,    _OnActivate); */
        HANDLE_MSG(hwnd, WM_CLOSE,      _OnClose);
        /* HANDLE_MSG(hwnd, WM_COMMAND, _OnCommand); */
        HANDLE_MSG(hwnd, WM_DESTROY,    _OnDestroy);
        HANDLE_MSG(hwnd, WM_DROPFILES,  _OnDropFiles);
        HANDLE_MSG(hwnd, WM_HSCROLL,    _OnScroll);
        HANDLE_MSG(hwnd, WM_KILLFOCUS,  _OnKillFocus);
#ifdef FEAT_MENU
        HANDLE_MSG(hwnd, WM_COMMAND,    _OnMenu);
#endif
        /* HANDLE_MSG(hwnd, WM_MOVE,        _OnMove); */
        /* HANDLE_MSG(hwnd, WM_NCACTIVATE,  _OnNCActivate); */
        HANDLE_MSG(hwnd, WM_SETFOCUS,   _OnSetFocus);
        HANDLE_MSG(hwnd, WM_SIZE,       _OnSize);
        /* HANDLE_MSG(hwnd, WM_SYSCOMMAND,  _OnSysCommand); */
        /* HANDLE_MSG(hwnd, WM_SYSKEYDOWN,  _OnAltKey); */
        HANDLE_MSG(hwnd, WM_VSCROLL,    _OnScroll);
        // HANDLE_MSG(hwnd, WM_WINDOWPOSCHANGING,       _OnWindowPosChanging);
        HANDLE_MSG(hwnd, WM_ACTIVATEAPP, _OnActivateApp);
#ifdef FEAT_NETBEANS_INTG
        HANDLE_MSG(hwnd, WM_WINDOWPOSCHANGED, _OnWindowPosChanged);
#endif

#ifdef FEAT_GUI_TABLINE
        case WM_RBUTTONUP:
        {
            if (gui_mch_showing_tabline())
            {
                POINT pt;
                RECT rect;

                /*
                 * If the cursor is on the tabline, display the tab menu
                 */
                GetCursorPos((LPPOINT)&pt);
                GetWindowRect(s_textArea, &rect);
                if (pt.y < rect.top)
                {
                    show_tabline_popup_menu();
                    return 0;
                }
            }
            return MyWindowProc(hwnd, uMsg, wParam, lParam);
        }
        case WM_LBUTTONDBLCLK:
        {
            /*
             * If the user double clicked the tabline, create a new tab
             */
            if (gui_mch_showing_tabline())
            {
                POINT pt;
                RECT rect;

                GetCursorPos((LPPOINT)&pt);
                GetWindowRect(s_textArea, &rect);
                if (pt.y < rect.top)
                    send_tabline_menu_event(0, TABLINE_MENU_NEW);
            }
            return MyWindowProc(hwnd, uMsg, wParam, lParam);
        }
#endif

    case WM_QUERYENDSESSION:    /* System wants to go down. */
        gui_shell_closed();     /* Will exit when no changed buffers. */
        return FALSE;           /* Do NOT allow system to go down. */

    case WM_ENDSESSION:
        if (wParam)     /* system only really goes down when wParam is TRUE */
            _OnEndSession();
        break;

    case WM_CHAR:
        /* Don't use HANDLE_MSG() for WM_CHAR, it truncates wParam to a single
         * byte while we want the UTF-16 character value. */
        _OnChar(hwnd, (UINT)wParam, (int)(short)LOWORD(lParam));
        return 0L;

    case WM_SYSCHAR:
        /*
         * if 'winaltkeys' is "no", or it's "menu" and it's not a menu
         * shortcut key, handle like a typed ALT key, otherwise call Windows
         * ALT key handling.
         */
#ifdef FEAT_MENU
        if (    !gui.menu_is_active
                || p_wak[0] == 'n'
                || (p_wak[0] == 'm' && !gui_is_menu_shortcut((int)wParam))
                )
#endif
        {
            _OnSysChar(hwnd, (UINT)wParam, (int)(short)LOWORD(lParam));
            return 0L;
        }
#ifdef FEAT_MENU
        else
            return MyWindowProc(hwnd, uMsg, wParam, lParam);
#endif

    case WM_SYSKEYUP:
#ifdef FEAT_MENU
        /* This used to be done only when menu is active: ALT key is used for
         * that.  But that caused problems when menu is disabled and using
         * Alt-Tab-Esc: get into a strange state where no mouse-moved events
         * are received, mouse pointer remains hidden. */
        return MyWindowProc(hwnd, uMsg, wParam, lParam);
#else
        return 0;
#endif

    case WM_SIZING:     /* HANDLE_MSG doesn't seem to handle this one */
        return _DuringSizing((UINT)wParam, (LPRECT)lParam);

    case WM_MOUSEWHEEL:
        _OnMouseWheel(hwnd, HIWORD(wParam));
        break;

        /* Notification for change in SystemParametersInfo() */
    case WM_SETTINGCHANGE:
        return _OnSettingChange((UINT)wParam);

#if defined(FEAT_TOOLBAR) || defined(FEAT_GUI_TABLINE)
    case WM_NOTIFY:
        switch (((LPNMHDR) lParam)->code)
        {
# ifdef FEAT_MBYTE
            case TTN_GETDISPINFOW:
# endif
            case TTN_GETDISPINFO:
                {
                    LPNMHDR             hdr = (LPNMHDR)lParam;
                    char_u              *str = NULL;
                    static void         *tt_text = NULL;

                    vim_free(tt_text);
                    tt_text = NULL;

# ifdef FEAT_GUI_TABLINE
                    if (gui_mch_showing_tabline()
                           && hdr->hwndFrom == TabCtrl_GetToolTips(s_tabhwnd))
                    {
                        POINT           pt;
                        /*
                         * Mouse is over the GUI tabline. Display the
                         * tooltip for the tab under the cursor
                         *
                         * Get the cursor position within the tab control
                         */
                        GetCursorPos(&pt);
                        if (ScreenToClient(s_tabhwnd, &pt) != 0)
                        {
                            TCHITTESTINFO htinfo;
                            int idx;

                            /*
                             * Get the tab under the cursor
                             */
                            htinfo.pt.x = pt.x;
                            htinfo.pt.y = pt.y;
                            idx = TabCtrl_HitTest(s_tabhwnd, &htinfo);
                            if (idx != -1)
                            {
                                tabpage_T *tp;

                                tp = find_tabpage(idx + 1);
                                if (tp != NULL)
                                {
                                    get_tabline_label(tp, TRUE);
                                    str = NameBuff;
                                }
                            }
                        }
                    }
# endif
# ifdef FEAT_TOOLBAR
#  ifdef FEAT_GUI_TABLINE
                    else
#  endif
                    {
                        UINT            idButton;
                        vimmenu_T       *pMenu;

                        idButton = (UINT) hdr->idFrom;
                        pMenu = gui_mswin_find_menu(root_menu, idButton);
                        if (pMenu)
                            str = pMenu->strings[MENU_INDEX_TIP];
                    }
# endif
                    if (str != NULL)
                    {
# ifdef FEAT_MBYTE
                        if (hdr->code == TTN_GETDISPINFOW)
                        {
                            LPNMTTDISPINFOW     lpdi = (LPNMTTDISPINFOW)lParam;

                            /* Set the maximum width, this also enables using
                             * \n for line break. */
                            SendMessage(lpdi->hdr.hwndFrom, TTM_SETMAXTIPWIDTH,
                                                                      0, 500);

                            tt_text = enc_to_utf16(str, NULL);
                            lpdi->lpszText = tt_text;
                            /* can't show tooltip if failed */
                        }
                        else
# endif
                        {
                            LPNMTTDISPINFO      lpdi = (LPNMTTDISPINFO)lParam;

                            /* Set the maximum width, this also enables using
                             * \n for line break. */
                            SendMessage(lpdi->hdr.hwndFrom, TTM_SETMAXTIPWIDTH,
                                                                      0, 500);

                            if (STRLEN(str) < sizeof(lpdi->szText)
                                    || ((tt_text = vim_strsave(str)) == NULL))
                                vim_strncpy(lpdi->szText, str,
                                                sizeof(lpdi->szText) - 1);
                            else
                                lpdi->lpszText = tt_text;
                        }
                    }
                }
                break;
# ifdef FEAT_GUI_TABLINE
            case TCN_SELCHANGE:
                if (gui_mch_showing_tabline()
                                  && ((LPNMHDR)lParam)->hwndFrom == s_tabhwnd)
                    send_tabline_event(TabCtrl_GetCurSel(s_tabhwnd) + 1);
                break;

            case NM_RCLICK:
                if (gui_mch_showing_tabline()
                        && ((LPNMHDR)lParam)->hwndFrom == s_tabhwnd)
                    show_tabline_popup_menu();
                break;
# endif
            default:
# ifdef FEAT_GUI_TABLINE
                if (gui_mch_showing_tabline()
                                  && ((LPNMHDR)lParam)->hwndFrom == s_tabhwnd)
                    return MyWindowProc(hwnd, uMsg, wParam, lParam);
# endif
                break;
        }
        break;
#endif
#if defined(MENUHINTS) && defined(FEAT_MENU)
    case WM_MENUSELECT:
        if (((UINT) HIWORD(wParam)
                    & (0xffff ^ (MF_MOUSESELECT + MF_BITMAP + MF_POPUP)))
                == MF_HILITE
                && (State & CMDLINE) == 0)
        {
            UINT        idButton;
            vimmenu_T   *pMenu;
            static int  did_menu_tip = FALSE;

            if (did_menu_tip)
            {
                msg_clr_cmdline();
                setcursor();
                out_flush();
                did_menu_tip = FALSE;
            }

            idButton = (UINT)LOWORD(wParam);
            pMenu = gui_mswin_find_menu(root_menu, idButton);
            if (pMenu != NULL && pMenu->strings[MENU_INDEX_TIP] != 0
                    && GetMenuState(s_menuBar, pMenu->id, MF_BYCOMMAND) != -1)
            {
                ++msg_hist_off;
                msg(pMenu->strings[MENU_INDEX_TIP]);
                --msg_hist_off;
                setcursor();
                out_flush();
                did_menu_tip = TRUE;
            }
        }
        break;
#endif
    case WM_NCHITTEST:
        {
            LRESULT     result;
            int         x, y;
            int         xPos = GET_X_LPARAM(lParam);

            result = MyWindowProc(hwnd, uMsg, wParam, lParam);
            if (result == HTCLIENT)
            {
#ifdef FEAT_GUI_TABLINE
                if (gui_mch_showing_tabline())
                {
                    int  yPos = GET_Y_LPARAM(lParam);
                    RECT rct;

                    /* If the cursor is on the GUI tabline, don't process this
                     * event */
                    GetWindowRect(s_textArea, &rct);
                    if (yPos < rct.top)
                        return result;
                }
#endif
                gui_mch_get_winpos(&x, &y);
                xPos -= x;

                if (xPos < 48) /* <VN> TODO should use system metric? */
                    return HTBOTTOMLEFT;
                else
                    return HTBOTTOMRIGHT;
            }
            else
                return result;
        }
        /* break; notreached */

#ifdef FEAT_MBYTE_IME
    case WM_IME_NOTIFY:
        if (!_OnImeNotify(hwnd, (DWORD)wParam, (DWORD)lParam))
            return MyWindowProc(hwnd, uMsg, wParam, lParam);
        break;
    case WM_IME_COMPOSITION:
        if (!_OnImeComposition(hwnd, wParam, lParam))
            return MyWindowProc(hwnd, uMsg, wParam, lParam);
        break;
#endif

    default:
        if (uMsg == msh_msgmousewheel && msh_msgmousewheel != 0)
        {   /* handle MSH_MOUSEWHEEL messages for Intellimouse */
            _OnMouseWheel(hwnd, HIWORD(wParam));
            break;
        }
#ifdef MSWIN_FIND_REPLACE
        else if (uMsg == s_findrep_msg && s_findrep_msg != 0)
        {
            _OnFindRepl();
        }
#endif
        return MyWindowProc(hwnd, uMsg, wParam, lParam);
    }

    return 1;
}

/*
 * End of call-back routines
 */

/* parent window, if specified with -P */
HWND vim_parent_hwnd = NULL;

    static BOOL CALLBACK
FindWindowTitle(HWND hwnd, LPARAM lParam)
{
    char        buf[2048];
    char        *title = (char *)lParam;

    if (GetWindowText(hwnd, buf, sizeof(buf)))
    {
        if (strstr(buf, title) != NULL)
        {
            /* Found it.  Store the window ref. and quit searching if MDI
             * works. */
            vim_parent_hwnd = FindWindowEx(hwnd, NULL, "MDIClient", NULL);
            if (vim_parent_hwnd != NULL)
                return FALSE;
        }
    }
    return TRUE;        /* continue searching */
}

/*
 * Invoked for '-P "title"' argument: search for parent application to open
 * our window in.
 */
    void
gui_mch_set_parent(char *title)
{
    EnumWindows(FindWindowTitle, (LPARAM)title);
    if (vim_parent_hwnd == NULL)
    {
        EMSG2(_("E671: Cannot find window title \"%s\""), title);
        mch_exit(2);
    }
}

#ifndef FEAT_OLE
    static void
ole_error(char *arg)
{
    char buf[IOSIZE];

    /* Can't use EMSG() here, we have not finished initialisation yet. */
    vim_snprintf(buf, IOSIZE,
            _("E243: Argument not supported: \"-%s\"; Use the OLE version."),
            arg);
    mch_errmsg(buf);
}
#endif

/*
 * Parse the GUI related command-line arguments.  Any arguments used are
 * deleted from argv, and *argc is decremented accordingly.  This is called
 * when vim is started, whether or not the GUI has been started.
 */
    void
gui_mch_prepare(int *argc, char **argv)
{
    int         silent = FALSE;
    int         idx;

    /* Check for special OLE command line parameters */
    if ((*argc == 2 || *argc == 3) && (argv[1][0] == '-' || argv[1][0] == '/'))
    {
        /* Check for a "-silent" argument first. */
        if (*argc == 3 && STRICMP(argv[1] + 1, "silent") == 0
                && (argv[2][0] == '-' || argv[2][0] == '/'))
        {
            silent = TRUE;
            idx = 2;
        }
        else
            idx = 1;

        /* Register Vim as an OLE Automation server */
        if (STRICMP(argv[idx] + 1, "register") == 0)
        {
#ifdef FEAT_OLE
            RegisterMe(silent);
            mch_exit(0);
#else
            if (!silent)
                ole_error("register");
            mch_exit(2);
#endif
        }

        /* Unregister Vim as an OLE Automation server */
        if (STRICMP(argv[idx] + 1, "unregister") == 0)
        {
#ifdef FEAT_OLE
            UnregisterMe(!silent);
            mch_exit(0);
#else
            if (!silent)
                ole_error("unregister");
            mch_exit(2);
#endif
        }

        /* Ignore an -embedding argument. It is only relevant if the
         * application wants to treat the case when it is started manually
         * differently from the case where it is started via automation (and
         * we don't).
         */
        if (STRICMP(argv[idx] + 1, "embedding") == 0)
        {
#ifdef FEAT_OLE
            *argc = 1;
#else
            ole_error("embedding");
            mch_exit(2);
#endif
        }
    }

#ifdef FEAT_OLE
    {
        int     bDoRestart = FALSE;

        InitOLE(&bDoRestart);
        /* automatically exit after registering */
        if (bDoRestart)
            mch_exit(0);
    }
#endif

#ifdef FEAT_NETBEANS_INTG
    {
        /* stolen from gui_x11.x */
        int arg;

        for (arg = 1; arg < *argc; arg++)
            if (strncmp("-nb", argv[arg], 3) == 0)
            {
                usingNetbeans++;
                netbeansArg = argv[arg];
                mch_memmove(&argv[arg], &argv[arg + 1],
                                            (--*argc - arg) * sizeof(char *));
                argv[*argc] = NULL;
                break;  /* enough? */
            }

        if (usingNetbeans)
        {
            WSADATA wsaData;
            int wsaerr;

            /* Init WinSock */
            wsaerr = WSAStartup(MAKEWORD(2, 2), &wsaData);
            if (wsaerr == 0)
                WSInitialized = TRUE;
        }
    }
#endif

    /* get the OS version info */
    os_version.dwOSVersionInfoSize = sizeof(os_version);
    GetVersionEx(&os_version); /* this call works on Win32s, Win95 and WinNT */

    /* try and load the user32.dll library and get the entry points for
     * multi-monitor-support. */
    if ((user32_lib = LoadLibrary("User32.dll")) != NULL)
    {
        pMonitorFromWindow = (TMonitorFromWindow)GetProcAddress(user32_lib,
                                                         "MonitorFromWindow");

        /* there are ...A and ...W version of GetMonitorInfo - looking at
         * winuser.h, they have exactly the same declaration. */
        pGetMonitorInfo = (TGetMonitorInfo)GetProcAddress(user32_lib,
                                                          "GetMonitorInfoA");
    }
}

/*
 * Initialise the GUI.  Create all the windows, set up all the call-backs
 * etc.
 */
    int
gui_mch_init(void)
{
    const char szVimWndClass[] = VIM_CLASS;
    const char szTextAreaClass[] = "VimTextArea";
    WNDCLASS wndclass;
#ifdef FEAT_MBYTE
    const WCHAR szVimWndClassW[] = VIM_CLASSW;
    const WCHAR szTextAreaClassW[] = L"VimTextArea";
    WNDCLASSW wndclassw;
#endif
#ifdef GLOBAL_IME
    ATOM        atom;
#endif

    /* Return here if the window was already opened (happens when
     * gui_mch_dialog() is called early). */
    if (s_hwnd != NULL)
        goto theend;

    /*
     * Load the tearoff bitmap
     */
#ifdef FEAT_TEAROFF
    s_htearbitmap = LoadBitmap(s_hinst, "IDB_TEAROFF");
#endif

    gui.scrollbar_width = GetSystemMetrics(SM_CXVSCROLL);
    gui.scrollbar_height = GetSystemMetrics(SM_CYHSCROLL);
#ifdef FEAT_MENU
    gui.menu_height = 0;        /* Windows takes care of this */
#endif
    gui.border_width = 0;

    s_brush = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));

#ifdef FEAT_MBYTE
    /* First try using the wide version, so that we can use any title.
     * Otherwise only characters in the active codepage will work. */
    if (GetClassInfoW(s_hinst, szVimWndClassW, &wndclassw) == 0)
    {
        wndclassw.style = CS_DBLCLKS;
        wndclassw.lpfnWndProc = _WndProc;
        wndclassw.cbClsExtra = 0;
        wndclassw.cbWndExtra = 0;
        wndclassw.hInstance = s_hinst;
        wndclassw.hIcon = LoadIcon(wndclassw.hInstance, "IDR_VIM");
        wndclassw.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclassw.hbrBackground = s_brush;
        wndclassw.lpszMenuName = NULL;
        wndclassw.lpszClassName = szVimWndClassW;

        if ((
#ifdef GLOBAL_IME
                    atom =
#endif
                    RegisterClassW(&wndclassw)) == 0)
        {
            if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
                return FAIL;

            /* Must be Windows 98, fall back to non-wide function. */
        }
        else
            wide_WindowProc = TRUE;
    }

    if (!wide_WindowProc)
#endif

    if (GetClassInfo(s_hinst, szVimWndClass, &wndclass) == 0)
    {
        wndclass.style = CS_DBLCLKS;
        wndclass.lpfnWndProc = _WndProc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = s_hinst;
        wndclass.hIcon = LoadIcon(wndclass.hInstance, "IDR_VIM");
        wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = s_brush;
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = szVimWndClass;

        if ((
#ifdef GLOBAL_IME
                    atom =
#endif
                    RegisterClass(&wndclass)) == 0)
            return FAIL;
    }

    if (vim_parent_hwnd != NULL)
    {
#ifdef HAVE_TRY_EXCEPT
        __try
        {
#endif
            /* Open inside the specified parent window.
             * TODO: last argument should point to a CLIENTCREATESTRUCT
             * structure. */
            s_hwnd = CreateWindowEx(
                WS_EX_MDICHILD,
                szVimWndClass, "Vim MSWindows GUI",
                WS_OVERLAPPEDWINDOW | WS_CHILD | WS_CLIPSIBLINGS | 0xC000,
                gui_win_x == -1 ? CW_USEDEFAULT : gui_win_x,
                gui_win_y == -1 ? CW_USEDEFAULT : gui_win_y,
                100,                            /* Any value will do */
                100,                            /* Any value will do */
                vim_parent_hwnd, NULL,
                s_hinst, NULL);
#ifdef HAVE_TRY_EXCEPT
        }
        __except(EXCEPTION_EXECUTE_HANDLER)
        {
            /* NOP */
        }
#endif
        if (s_hwnd == NULL)
        {
            EMSG(_("E672: Unable to open window inside MDI application"));
            mch_exit(2);
        }
    }
    else
    {
        /* If the provided windowid is not valid reset it to zero, so that it
         * is ignored and we open our own window. */
        if (IsWindow((HWND)win_socket_id) <= 0)
            win_socket_id = 0;

        /* Create a window.  If win_socket_id is not zero without border and
         * titlebar, it will be reparented below. */
        s_hwnd = CreateWindow(
                szVimWndClass, "Vim MSWindows GUI",
                win_socket_id == 0 ? WS_OVERLAPPEDWINDOW : WS_POPUP,
                gui_win_x == -1 ? CW_USEDEFAULT : gui_win_x,
                gui_win_y == -1 ? CW_USEDEFAULT : gui_win_y,
                100,                            /* Any value will do */
                100,                            /* Any value will do */
                NULL, NULL,
                s_hinst, NULL);
        if (s_hwnd != NULL && win_socket_id != 0)
        {
            SetParent(s_hwnd, (HWND)win_socket_id);
            ShowWindow(s_hwnd, SW_SHOWMAXIMIZED);
        }
    }

    if (s_hwnd == NULL)
        return FAIL;

#ifdef GLOBAL_IME
    global_ime_init(atom, s_hwnd);
#endif
#if defined(FEAT_MBYTE_IME) && defined(DYNAMIC_IME)
    dyn_imm_load();
#endif

    /* Create the text area window */
#ifdef FEAT_MBYTE
    if (wide_WindowProc)
    {
        if (GetClassInfoW(s_hinst, szTextAreaClassW, &wndclassw) == 0)
        {
            wndclassw.style = CS_OWNDC;
            wndclassw.lpfnWndProc = _TextAreaWndProc;
            wndclassw.cbClsExtra = 0;
            wndclassw.cbWndExtra = 0;
            wndclassw.hInstance = s_hinst;
            wndclassw.hIcon = NULL;
            wndclassw.hCursor = LoadCursor(NULL, IDC_ARROW);
            wndclassw.hbrBackground = NULL;
            wndclassw.lpszMenuName = NULL;
            wndclassw.lpszClassName = szTextAreaClassW;

            if (RegisterClassW(&wndclassw) == 0)
                return FAIL;
        }
    }
    else
#endif
    if (GetClassInfo(s_hinst, szTextAreaClass, &wndclass) == 0)
    {
        wndclass.style = CS_OWNDC;
        wndclass.lpfnWndProc = _TextAreaWndProc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = s_hinst;
        wndclass.hIcon = NULL;
        wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = NULL;
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = szTextAreaClass;

        if (RegisterClass(&wndclass) == 0)
            return FAIL;
    }
    s_textArea = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        szTextAreaClass, "Vim text area",
        WS_CHILD | WS_VISIBLE, 0, 0,
        100,                            /* Any value will do for now */
        100,                            /* Any value will do for now */
        s_hwnd, NULL,
        s_hinst, NULL);

    if (s_textArea == NULL)
        return FAIL;

#ifdef FEAT_MENU
    s_menuBar = CreateMenu();
#endif
    s_hdc = GetDC(s_textArea);

#ifdef MSWIN16_FASTTEXT
    SetBkMode(s_hdc, OPAQUE);
#endif

#ifdef FEAT_WINDOWS
    DragAcceptFiles(s_hwnd, TRUE);
#endif

    /* Do we need to bother with this? */
    /* m_fMouseAvail = GetSystemMetrics(SM_MOUSEPRESENT); */

    /* Get background/foreground colors from the system */
    gui_mch_def_colors();

    /* Get the colors from the "Normal" group (set in syntax.c or in a vimrc
     * file) */
    set_normal_colors();

    /*
     * Check that none of the colors are the same as the background color.
     * Then store the current values as the defaults.
     */
    gui_check_colors();
    gui.def_norm_pixel = gui.norm_pixel;
    gui.def_back_pixel = gui.back_pixel;

    /* Get the colors for the highlight groups (gui_check_colors() might have
     * changed them) */
    highlight_gui_started();

    /*
     * Start out by adding the configured border width into the border offset
     */
    gui.border_offset = gui.border_width + 2;   /*CLIENT EDGE*/

    /*
     * Set up for Intellimouse processing
     */
    init_mouse_wheel();

    /*
     * compute a couple of metrics used for the dialogs
     */
    get_dialog_font_metrics();
#ifdef FEAT_TOOLBAR
    /*
     * Create the toolbar
     */
    initialise_toolbar();
#endif
#ifdef FEAT_GUI_TABLINE
    /*
     * Create the tabline
     */
    initialise_tabline();
#endif
#ifdef MSWIN_FIND_REPLACE
    /*
     * Initialise the dialog box stuff
     */
    s_findrep_msg = RegisterWindowMessage(FINDMSGSTRING);

    /* Initialise the struct */
    s_findrep_struct.lStructSize = sizeof(s_findrep_struct);
    s_findrep_struct.lpstrFindWhat = alloc(MSWIN_FR_BUFSIZE);
    s_findrep_struct.lpstrFindWhat[0] = NUL;
    s_findrep_struct.lpstrReplaceWith = alloc(MSWIN_FR_BUFSIZE);
    s_findrep_struct.lpstrReplaceWith[0] = NUL;
    s_findrep_struct.wFindWhatLen = MSWIN_FR_BUFSIZE;
    s_findrep_struct.wReplaceWithLen = MSWIN_FR_BUFSIZE;
# if defined(FEAT_MBYTE) && defined(WIN3264)
    s_findrep_struct_w.lStructSize = sizeof(s_findrep_struct_w);
    s_findrep_struct_w.lpstrFindWhat =
                              (LPWSTR)alloc(MSWIN_FR_BUFSIZE * sizeof(WCHAR));
    s_findrep_struct_w.lpstrFindWhat[0] = NUL;
    s_findrep_struct_w.lpstrReplaceWith =
                              (LPWSTR)alloc(MSWIN_FR_BUFSIZE * sizeof(WCHAR));
    s_findrep_struct_w.lpstrReplaceWith[0] = NUL;
    s_findrep_struct_w.wFindWhatLen = MSWIN_FR_BUFSIZE;
    s_findrep_struct_w.wReplaceWithLen = MSWIN_FR_BUFSIZE;
# endif
#endif

theend:
    /* Display any pending error messages */
    display_errors();

    return OK;
}

/*
 * Get the size of the screen, taking position on multiple monitors into
 * account (if supported).
 */
    static void
get_work_area(RECT *spi_rect)
{
    _HMONITOR       mon;
    _MONITORINFO    moninfo;

    /* use these functions only if available */
    if (pMonitorFromWindow != NULL && pGetMonitorInfo != NULL)
    {
        /* work out which monitor the window is on, and get *it's* work area */
        mon = pMonitorFromWindow(s_hwnd, 1 /*MONITOR_DEFAULTTOPRIMARY*/);
        if (mon != NULL)
        {
            moninfo.cbSize = sizeof(_MONITORINFO);
            if (pGetMonitorInfo(mon, &moninfo))
            {
                *spi_rect = moninfo.rcWork;
                return;
            }
        }
    }
    /* this is the old method... */
    SystemParametersInfo(SPI_GETWORKAREA, 0, spi_rect, 0);
}

/*
 * Set the size of the window to the given width and height in pixels.
 */
/*ARGSUSED*/
    void
gui_mch_set_shellsize(int width, int height,
        int min_width, int min_height, int base_width, int base_height,
        int direction)
{
    RECT        workarea_rect;
    int         win_width, win_height;
    int         win_xpos, win_ypos;
    WINDOWPLACEMENT wndpl;
    int         workarea_left;

    /* Try to keep window completely on screen. */
    /* Get position of the screen work area.  This is the part that is not
     * used by the taskbar or appbars. */
    get_work_area(&workarea_rect);

    /* Get current posision of our window.  Note that the .left and .top are
     * relative to the work area.  */
    wndpl.length = sizeof(WINDOWPLACEMENT);
    GetWindowPlacement(s_hwnd, &wndpl);

    /* Resizing a maximized window looks very strange, unzoom it first.
     * But don't do it when still starting up, it may have been requested in
     * the shortcut. */
    if (wndpl.showCmd == SW_SHOWMAXIMIZED && starting == 0)
    {
        ShowWindow(s_hwnd, SW_SHOWNORMAL);
        /* Need to get the settings of the normal window. */
        GetWindowPlacement(s_hwnd, &wndpl);
    }

    win_xpos = wndpl.rcNormalPosition.left;
    win_ypos = wndpl.rcNormalPosition.top;

    /* compute the size of the outside of the window */
    win_width = width + GetSystemMetrics(SM_CXFRAME) * 2;
    win_height = height + GetSystemMetrics(SM_CYFRAME) * 2
                        + GetSystemMetrics(SM_CYCAPTION)
#ifdef FEAT_MENU
                        + gui_mswin_get_menu_height(FALSE)
#endif
                        ;

    /* There is an inconsistency when using two monitors and Vim is on the
     * second (right) one: win_xpos will be the offset from the workarea of
     * the left monitor.  While with one monitor it's the offset from the
     * workarea (including a possible taskbar on the left).  Detect the second
     * monitor by checking for the left offset to be quite big. */
    if (workarea_rect.left > 300)
        workarea_left = 0;
    else
        workarea_left = workarea_rect.left;

    /* If the window is going off the screen, move it on to the screen.
     * win_xpos and win_ypos are relative to the workarea. */
    if ((direction & RESIZE_HOR)
            && workarea_left + win_xpos + win_width > workarea_rect.right)
        win_xpos = workarea_rect.right - win_width - workarea_left;

    if ((direction & RESIZE_HOR) && win_xpos < 0)
        win_xpos = 0;

    if ((direction & RESIZE_VERT)
          && workarea_rect.top + win_ypos + win_height > workarea_rect.bottom)
        win_ypos = workarea_rect.bottom - win_height - workarea_rect.top;

    if ((direction & RESIZE_VERT) && win_ypos < 0)
        win_ypos = 0;

    wndpl.rcNormalPosition.left = win_xpos;
    wndpl.rcNormalPosition.right = win_xpos + win_width;
    wndpl.rcNormalPosition.top = win_ypos;
    wndpl.rcNormalPosition.bottom = win_ypos + win_height;

    /* set window position - we should use SetWindowPlacement rather than
     * SetWindowPos as the MSDN docs say the coord systems returned by
     * these two are not compatible. */
    SetWindowPlacement(s_hwnd, &wndpl);

    SetActiveWindow(s_hwnd);
    SetFocus(s_hwnd);

#ifdef FEAT_MENU
    /* Menu may wrap differently now */
    gui_mswin_get_menu_height(!gui.starting);
#endif
}


    void
gui_mch_set_scrollbar_thumb(
    scrollbar_T *sb,
    long        val,
    long        size,
    long        max)
{
    SCROLLINFO  info;

    sb->scroll_shift = 0;
    while (max > 32767)
    {
        max = (max + 1) >> 1;
        val  >>= 1;
        size >>= 1;
        ++sb->scroll_shift;
    }

    if (sb->scroll_shift > 0)
        ++size;

    info.cbSize = sizeof(info);
    info.fMask = SIF_POS | SIF_RANGE | SIF_PAGE;
    info.nPos = val;
    info.nMin = 0;
    info.nMax = max;
    info.nPage = size;
    SetScrollInfo(sb->id, SB_CTL, &info, TRUE);
}


/*
 * Set the current text font.
 */
    void
gui_mch_set_font(GuiFont font)
{
    gui.currFont = font;
}


/*
 * Set the current text foreground color.
 */
    void
gui_mch_set_fg_color(guicolor_T color)
{
    gui.currFgColor = color;
}

/*
 * Set the current text background color.
 */
    void
gui_mch_set_bg_color(guicolor_T color)
{
    gui.currBgColor = color;
}

/*
 * Set the current text special color.
 */
    void
gui_mch_set_sp_color(guicolor_T color)
{
    gui.currSpColor = color;
}

#if defined(FEAT_MBYTE) && defined(FEAT_MBYTE_IME)
/*
 * Multi-byte handling, originally by Sung-Hoon Baek.
 * First static functions (no prototypes generated).
 */
#ifdef _MSC_VER
# include <ime.h>   /* Apparently not needed for Cygwin, MingW or Borland. */
#endif
#include <imm.h>

/*
 * handle WM_IME_NOTIFY message
 */
/*ARGSUSED*/
    static LRESULT
_OnImeNotify(HWND hWnd, DWORD dwCommand, DWORD dwData)
{
    LRESULT lResult = 0;
    HIMC hImc;

    if (!pImmGetContext || (hImc = pImmGetContext(hWnd)) == (HIMC)0)
        return lResult;
    switch (dwCommand)
    {
        case IMN_SETOPENSTATUS:
            if (pImmGetOpenStatus(hImc))
            {
                pImmSetCompositionFont(hImc, &norm_logfont);
                im_set_position(gui.row, gui.col);

                /* Disable langmap */
                State &= ~LANGMAP;
                if (State & INSERT)
                {
#if defined(FEAT_WINDOWS) && defined(FEAT_KEYMAP)
                    /* Unshown 'keymap' in status lines */
                    if (curbuf->b_p_iminsert == B_IMODE_LMAP)
                    {
                        /* Save cursor position */
                        int old_row = gui.row;
                        int old_col = gui.col;

                        // This must be called here before
                        // status_redraw_curbuf(), otherwise the mode
                        // message may appear in the wrong position.
                        showmode();
                        status_redraw_curbuf();
                        update_screen(0);
                        /* Restore cursor position */
                        gui.row = old_row;
                        gui.col = old_col;
                    }
#endif
                }
            }
            gui_update_cursor(TRUE, FALSE);
            lResult = 0;
            break;
    }
    pImmReleaseContext(hWnd, hImc);
    return lResult;
}

/*ARGSUSED*/
    static LRESULT
_OnImeComposition(HWND hwnd, WPARAM dbcs, LPARAM param)
{
    char_u      *ret;
    int         len;

    if ((param & GCS_RESULTSTR) == 0) /* Composition unfinished. */
        return 0;

    ret = GetResultStr(hwnd, GCS_RESULTSTR, &len);
    if (ret != NULL)
    {
        add_to_input_buf_csi(ret, len);
        vim_free(ret);
        return 1;
    }
    return 0;
}

/*
 * get the current composition string, in UCS-2; *lenp is the number of
 * *lenp is the number of Unicode characters.
 */
    static short_u *
GetCompositionString_inUCS2(HIMC hIMC, DWORD GCS, int *lenp)
{
    LONG            ret;
    LPWSTR          wbuf = NULL;
    char_u          *buf;

    if (!pImmGetContext)
        return NULL; /* no imm32.dll */

    /* Try Unicode; this'll always work on NT regardless of codepage. */
    ret = pImmGetCompositionStringW(hIMC, GCS, NULL, 0);
    if (ret == 0)
        return NULL; /* empty */

    if (ret > 0)
    {
        /* Allocate the requested buffer plus space for the NUL character. */
        wbuf = (LPWSTR)alloc(ret + sizeof(WCHAR));
        if (wbuf != NULL)
        {
            pImmGetCompositionStringW(hIMC, GCS, wbuf, ret);
            *lenp = ret / sizeof(WCHAR);
        }
        return (short_u *)wbuf;
    }

    /* ret < 0; we got an error, so try the ANSI version.  This'll work
     * on 9x/ME, but only if the codepage happens to be set to whatever
     * we're inputting. */
    ret = pImmGetCompositionStringA(hIMC, GCS, NULL, 0);
    if (ret <= 0)
        return NULL; /* empty or error */

    buf = alloc(ret);
    if (buf == NULL)
        return NULL;
    pImmGetCompositionStringA(hIMC, GCS, buf, ret);

    /* convert from codepage to UCS-2 */
    MultiByteToWideChar_alloc(GetACP(), 0, buf, ret, &wbuf, lenp);
    vim_free(buf);

    return (short_u *)wbuf;
}

/*
 * void GetResultStr()
 *
 * This handles WM_IME_COMPOSITION with GCS_RESULTSTR flag on.
 * get complete composition string
 */
    static char_u *
GetResultStr(HWND hwnd, int GCS, int *lenp)
{
    HIMC        hIMC;           /* Input context handle. */
    short_u     *buf = NULL;
    char_u      *convbuf = NULL;

    if (!pImmGetContext || (hIMC = pImmGetContext(hwnd)) == (HIMC)0)
        return NULL;

    /* Reads in the composition string. */
    buf = GetCompositionString_inUCS2(hIMC, GCS, lenp);
    if (buf == NULL)
        return NULL;

    convbuf = utf16_to_enc(buf, lenp);
    pImmReleaseContext(hwnd, hIMC);
    vim_free(buf);
    return convbuf;
}
#endif

/* For global functions we need prototypes. */
#if (defined(FEAT_MBYTE) && defined(FEAT_MBYTE_IME)) || defined(PROTO)

/*
 * set font to IM.
 */
    void
im_set_font(LOGFONT *lf)
{
    HIMC hImc;

    if (pImmGetContext && (hImc = pImmGetContext(s_hwnd)) != (HIMC)0)
    {
        pImmSetCompositionFont(hImc, lf);
        pImmReleaseContext(s_hwnd, hImc);
    }
}

/*
 * Notify cursor position to IM.
 */
    void
im_set_position(int row, int col)
{
    HIMC hImc;

    if (pImmGetContext && (hImc = pImmGetContext(s_hwnd)) != (HIMC)0)
    {
        COMPOSITIONFORM cfs;

        cfs.dwStyle = CFS_POINT;
        cfs.ptCurrentPos.x = FILL_X(col);
        cfs.ptCurrentPos.y = FILL_Y(row);
        MapWindowPoints(s_textArea, s_hwnd, &cfs.ptCurrentPos, 1);
        pImmSetCompositionWindow(hImc, &cfs);

        pImmReleaseContext(s_hwnd, hImc);
    }
}

/*
 * Set IM status on ("active" is TRUE) or off ("active" is FALSE).
 */
    void
im_set_active(int active)
{
    HIMC        hImc;
    static HIMC hImcOld = (HIMC)0;

    if (pImmGetContext)     /* if NULL imm32.dll wasn't loaded (yet) */
    {
        if (p_imdisable)
        {
            if (hImcOld == (HIMC)0)
            {
                hImcOld = pImmGetContext(s_hwnd);
                if (hImcOld)
                    pImmAssociateContext(s_hwnd, (HIMC)0);
            }
            active = FALSE;
        }
        else if (hImcOld != (HIMC)0)
        {
            pImmAssociateContext(s_hwnd, hImcOld);
            hImcOld = (HIMC)0;
        }

        hImc = pImmGetContext(s_hwnd);
        if (hImc)
        {
            /*
             * for Korean ime
             */
            HKL hKL = GetKeyboardLayout(0);

            if (LOWORD(hKL) == MAKELANGID(LANG_KOREAN, SUBLANG_KOREAN))
            {
                static DWORD dwConversionSaved = 0, dwSentenceSaved = 0;
                static BOOL bSaved = FALSE;

                if (active)
                {
                    /* if we have a saved conversion status, restore it */
                    if (bSaved)
                        pImmSetConversionStatus(hImc, dwConversionSaved,
                                                             dwSentenceSaved);
                    bSaved = FALSE;
                }
                else
                {
                    /* save conversion status and disable korean */
                    if (pImmGetConversionStatus(hImc, &dwConversionSaved,
                                                            &dwSentenceSaved))
                    {
                        bSaved = TRUE;
                        pImmSetConversionStatus(hImc,
                                dwConversionSaved & ~(IME_CMODE_NATIVE
                                                       | IME_CMODE_FULLSHAPE),
                                dwSentenceSaved);
                    }
                }
            }

            pImmSetOpenStatus(hImc, active);
            pImmReleaseContext(s_hwnd, hImc);
        }
    }
}

/*
 * Get IM status.  When IM is on, return not 0.  Else return 0.
 */
    int
im_get_status()
{
    int         status = 0;
    HIMC        hImc;

    if (pImmGetContext && (hImc = pImmGetContext(s_hwnd)) != (HIMC)0)
    {
        status = pImmGetOpenStatus(hImc) ? 1 : 0;
        pImmReleaseContext(s_hwnd, hImc);
    }
    return status;
}

#endif /* FEAT_MBYTE && FEAT_MBYTE_IME */

#if defined(FEAT_MBYTE) && !defined(FEAT_MBYTE_IME) && defined(GLOBAL_IME)
/* Win32 with GLOBAL IME */

/*
 * Notify cursor position to IM.
 */
    void
im_set_position(int row, int col)
{
    /* Win32 with GLOBAL IME */
    POINT p;

    p.x = FILL_X(col);
    p.y = FILL_Y(row);
    MapWindowPoints(s_textArea, s_hwnd, &p, 1);
    global_ime_set_position(&p);
}

/*
 * Set IM status on ("active" is TRUE) or off ("active" is FALSE).
 */
    void
im_set_active(int active)
{
    global_ime_set_status(active);
}

/*
 * Get IM status.  When IM is on, return not 0.  Else return 0.
 */
    int
im_get_status()
{
    return global_ime_get_status();
}
#endif

#ifdef FEAT_MBYTE
/*
 * Convert latin9 text "text[len]" to ucs-2 in "unicodebuf".
 */
    static void
latin9_to_ucs(char_u *text, int len, WCHAR *unicodebuf)
{
    int         c;

    while (--len >= 0)
    {
        c = *text++;
        switch (c)
        {
            case 0xa4: c = 0x20ac; break;   /* euro */
            case 0xa6: c = 0x0160; break;   /* S hat */
            case 0xa8: c = 0x0161; break;   /* S -hat */
            case 0xb4: c = 0x017d; break;   /* Z hat */
            case 0xb8: c = 0x017e; break;   /* Z -hat */
            case 0xbc: c = 0x0152; break;   /* OE */
            case 0xbd: c = 0x0153; break;   /* oe */
            case 0xbe: c = 0x0178; break;   /* Y */
        }
        *unicodebuf++ = c;
    }
}
#endif

#ifdef FEAT_RIGHTLEFT
/*
 * What is this for?  In the case where you are using Win98 or Win2K or later,
 * and you are using a Hebrew font (or Arabic!), Windows does you a favor and
 * reverses the string sent to the TextOut... family.  This sucks, because we
 * go to a lot of effort to do the right thing, and there doesn't seem to be a
 * way to tell Windblows not to do this!
 *
 * The short of it is that this 'RevOut' only gets called if you are running
 * one of the new, "improved" MS OSes, and only if you are running in
 * 'rightleft' mode.  It makes display take *slightly* longer, but not
 * noticeably so.
 */
    static void
RevOut( HDC s_hdc,
        int col,
        int row,
        UINT foptions,
        CONST RECT *pcliprect,
        LPCTSTR text,
        UINT len,
        CONST INT *padding)
{
    int         ix;
    static int  special = -1;

    if (special == -1)
    {
        /* Check windows version: special treatment is needed if it is NT 5 or
         * Win98 or higher. */
        if  ((os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                    && os_version.dwMajorVersion >= 5)
                || (os_version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS
                    && (os_version.dwMajorVersion > 4
                        || (os_version.dwMajorVersion == 4
                            && os_version.dwMinorVersion > 0))))
            special = 1;
        else
            special = 0;
    }

    if (special)
        for (ix = 0; ix < (int)len; ++ix)
            ExtTextOut(s_hdc, col + TEXT_X(ix), row, foptions,
                                            pcliprect, text + ix, 1, padding);
    else
        ExtTextOut(s_hdc, col, row, foptions, pcliprect, text, len, padding);
}
#endif

    void
gui_mch_draw_string(
    int         row,
    int         col,
    char_u      *text,
    int         len,
    int         flags)
{
    static int  *padding = NULL;
    static int  pad_size = 0;
    int         i;
    const RECT  *pcliprect = NULL;
    UINT        foptions = 0;
#ifdef FEAT_MBYTE
    static WCHAR *unicodebuf = NULL;
    static int   *unicodepdy = NULL;
    static int  unibuflen = 0;
    int         n = 0;
#endif
    HPEN        hpen, old_pen;
    int         y;

#ifndef MSWIN16_FASTTEXT
    /*
     * Italic and bold text seems to have an extra row of pixels at the bottom
     * (below where the bottom of the character should be).  If we draw the
     * characters with a solid background, the top row of pixels in the
     * character below will be overwritten.  We can fix this by filling in the
     * background ourselves, to the correct character proportions, and then
     * writing the character in transparent mode.  Still have a problem when
     * the character is "_", which gets written on to the character below.
     * New fix: set gui.char_ascent to -1.  This shifts all characters up one
     * pixel in their slots, which fixes the problem with the bottom row of
     * pixels.  We still need this code because otherwise the top row of pixels
     * becomes a problem. - webb.
     */
    static HBRUSH       hbr_cache[2] = {NULL, NULL};
    static guicolor_T   brush_color[2] = {INVALCOLOR, INVALCOLOR};
    static int          brush_lru = 0;
    HBRUSH              hbr;
    RECT                rc;

    if (!(flags & DRAW_TRANSP))
    {
        /*
         * Clear background first.
         * Note: FillRect() excludes right and bottom of rectangle.
         */
        rc.left = FILL_X(col);
        rc.top = FILL_Y(row);
#ifdef FEAT_MBYTE
        if (has_mbyte)
        {
            int cell_len = 0;

            /* Compute the length in display cells. */
            for (n = 0; n < len; n += MB_BYTE2LEN(text[n]))
                cell_len += (*mb_ptr2cells)(text + n);
            rc.right = FILL_X(col + cell_len);
        }
        else
#endif
            rc.right = FILL_X(col + len);
        rc.bottom = FILL_Y(row + 1);

        /* Cache the created brush, that saves a lot of time.  We need two:
         * one for cursor background and one for the normal background. */
        if (gui.currBgColor == brush_color[0])
        {
            hbr = hbr_cache[0];
            brush_lru = 1;
        }
        else if (gui.currBgColor == brush_color[1])
        {
            hbr = hbr_cache[1];
            brush_lru = 0;
        }
        else
        {
            if (hbr_cache[brush_lru] != NULL)
                DeleteBrush(hbr_cache[brush_lru]);
            hbr_cache[brush_lru] = CreateSolidBrush(gui.currBgColor);
            brush_color[brush_lru] = gui.currBgColor;
            hbr = hbr_cache[brush_lru];
            brush_lru = !brush_lru;
        }
        FillRect(s_hdc, &rc, hbr);

        SetBkMode(s_hdc, TRANSPARENT);

        /*
         * When drawing block cursor, prevent inverted character spilling
         * over character cell (can happen with bold/italic)
         */
        if (flags & DRAW_CURSOR)
        {
            pcliprect = &rc;
            foptions = ETO_CLIPPED;
        }
    }
#else
    /*
     * The alternative would be to write the characters in opaque mode, but
     * when the text is not exactly the same proportions as normal text, too
     * big or too little a rectangle gets drawn for the background.
     */
    SetBkMode(s_hdc, OPAQUE);
    SetBkColor(s_hdc, gui.currBgColor);
#endif
    SetTextColor(s_hdc, gui.currFgColor);
    SelectFont(s_hdc, gui.currFont);

    if (pad_size != Columns || padding == NULL || padding[0] != gui.char_width)
    {
        vim_free(padding);
        pad_size = Columns;

        /* Don't give an out-of-memory message here, it would call us
         * recursively. */
        padding = (int *)lalloc(pad_size * sizeof(int), FALSE);
        if (padding != NULL)
            for (i = 0; i < pad_size; i++)
                padding[i] = gui.char_width;
    }

    /* On NT, tell the font renderer not to "help" us with Hebrew and Arabic
     * text.  This doesn't work in 9x, so we have to deal with it manually on
     * those systems. */
    if (os_version.dwPlatformId == VER_PLATFORM_WIN32_NT)
        foptions |= ETO_IGNORELANGUAGE;

    /*
     * We have to provide the padding argument because italic and bold versions
     * of fixed-width fonts are often one pixel or so wider than their normal
     * versions.
     * No check for DRAW_BOLD, Windows will have done it already.
     */

#ifdef FEAT_MBYTE
    /* Check if there are any UTF-8 characters.  If not, use normal text
     * output to speed up output. */
    if (enc_utf8)
        for (n = 0; n < len; ++n)
            if (text[n] >= 0x80)
                break;

    /* Check if the Unicode buffer exists and is big enough.  Create it
     * with the same length as the multi-byte string, the number of wide
     * characters is always equal or smaller. */
    if ((enc_utf8
                || (enc_codepage > 0 && (int)GetACP() != enc_codepage)
                || enc_latin9)
            && (unicodebuf == NULL || len > unibuflen))
    {
        vim_free(unicodebuf);
        unicodebuf = (WCHAR *)lalloc(len * sizeof(WCHAR), FALSE);

        vim_free(unicodepdy);
        unicodepdy = (int *)lalloc(len * sizeof(int), FALSE);

        unibuflen = len;
    }

    if (enc_utf8 && n < len && unicodebuf != NULL)
    {
        /* Output UTF-8 characters.  Caller has already separated
         * composing characters. */
        int             i;
        int             wlen;   /* string length in words */
        int             clen;   /* string length in characters */
        int             cells;  /* cell width of string up to composing char */
        int             cw;     /* width of current cell */
        int             c;

        wlen = 0;
        clen = 0;
        cells = 0;
        for (i = 0; i < len; )
        {
            c = utf_ptr2char(text + i);
            if (c >= 0x10000)
            {
                /* Turn into UTF-16 encoding. */
                unicodebuf[wlen++] = ((c - 0x10000) >> 10) + 0xD800;
                unicodebuf[wlen++] = ((c - 0x10000) & 0x3ff) + 0xDC00;
            }
            else
            {
                unicodebuf[wlen++] = c;
            }
            cw = utf_char2cells(c);
            if (cw > 2)         /* don't use 4 for unprintable char */
                cw = 1;
            if (unicodepdy != NULL)
            {
                /* Use unicodepdy to make characters fit as we expect, even
                 * when the font uses different widths (e.g., bold character
                 * is wider).  */
                unicodepdy[clen] = cw * gui.char_width;
            }
            cells += cw;
            i += utfc_ptr2len_len(text + i, len - i);
            ++clen;
        }
        ExtTextOutW(s_hdc, TEXT_X(col), TEXT_Y(row),
                           foptions, pcliprect, unicodebuf, wlen, unicodepdy);
        len = cells;    /* used for underlining */
    }
    else if ((enc_codepage > 0 && (int)GetACP() != enc_codepage) || enc_latin9)
    {
        /* If we want to display codepage data, and the current CP is not the
         * ANSI one, we need to go via Unicode. */
        if (unicodebuf != NULL)
        {
            if (enc_latin9)
                latin9_to_ucs(text, len, unicodebuf);
            else
                len = MultiByteToWideChar(enc_codepage,
                        MB_PRECOMPOSED,
                        (char *)text, len,
                        (LPWSTR)unicodebuf, unibuflen);
            if (len != 0)
            {
                /* Use unicodepdy to make characters fit as we expect, even
                 * when the font uses different widths (e.g., bold character
                 * is wider). */
                if (unicodepdy != NULL)
                {
                    int i;
                    int cw;

                    for (i = 0; i < len; ++i)
                    {
                        cw = utf_char2cells(unicodebuf[i]);
                        if (cw > 2)
                            cw = 1;
                        unicodepdy[i] = cw * gui.char_width;
                    }
                }
                ExtTextOutW(s_hdc, TEXT_X(col), TEXT_Y(row),
                            foptions, pcliprect, unicodebuf, len, unicodepdy);
            }
        }
    }
    else
#endif
    {
#ifdef FEAT_RIGHTLEFT
        /* If we can't use ETO_IGNORELANGUAGE, we can't tell Windows not to
         * mess up RL text, so we have to draw it character-by-character.
         * Only do this if RL is on, since it's slow. */
        if (curwin->w_p_rl && !(foptions & ETO_IGNORELANGUAGE))
            RevOut(s_hdc, TEXT_X(col), TEXT_Y(row),
                         foptions, pcliprect, (char *)text, len, padding);
        else
#endif
            ExtTextOut(s_hdc, TEXT_X(col), TEXT_Y(row),
                         foptions, pcliprect, (char *)text, len, padding);
    }

    /* Underline */
    if (flags & DRAW_UNDERL)
    {
        hpen = CreatePen(PS_SOLID, 1, gui.currFgColor);
        old_pen = SelectObject(s_hdc, hpen);
        /* When p_linespace is 0, overwrite the bottom row of pixels.
         * Otherwise put the line just below the character. */
        y = FILL_Y(row + 1) - 1;
#ifndef MSWIN16_FASTTEXT
        if (p_linespace > 1)
            y -= p_linespace - 1;
#endif
        MoveToEx(s_hdc, FILL_X(col), y, NULL);
        /* Note: LineTo() excludes the last pixel in the line. */
        LineTo(s_hdc, FILL_X(col + len), y);
        DeleteObject(SelectObject(s_hdc, old_pen));
    }

    /* Undercurl */
    if (flags & DRAW_UNDERC)
    {
        int                     x;
        int                     offset;
        static const int        val[8] = {1, 0, 0, 0, 1, 2, 2, 2 };

        y = FILL_Y(row + 1) - 1;
        for (x = FILL_X(col); x < FILL_X(col + len); ++x)
        {
            offset = val[x % 8];
            SetPixel(s_hdc, x, y - offset, gui.currSpColor);
        }
    }
}


/*
 * Output routines.
 */

/* Flush any output to the screen */
    void
gui_mch_flush(void)
{
#   if defined(__BORLANDC__)
    /*
     * The GdiFlush declaration (in Borland C 5.01 <wingdi.h>) is not a
     * prototype declaration.
     * The compiler complains if __stdcall is not used in both declarations.
     */
    BOOL  __stdcall GdiFlush(void);
#   endif

    GdiFlush();
}

    static void
clear_rect(RECT *rcp)
{
    HBRUSH  hbr;

    hbr = CreateSolidBrush(gui.back_pixel);
    FillRect(s_hdc, rcp, hbr);
    DeleteBrush(hbr);
}


    void
gui_mch_get_screen_dimensions(int *screen_w, int *screen_h)
{
    RECT        workarea_rect;

    get_work_area(&workarea_rect);

    *screen_w = workarea_rect.right - workarea_rect.left
                - GetSystemMetrics(SM_CXFRAME) * 2;

    /* FIXME: dirty trick: Because the gui_get_base_height() doesn't include
     * the menubar for MSwin, we subtract it from the screen height, so that
     * the window size can be made to fit on the screen. */
    *screen_h = workarea_rect.bottom - workarea_rect.top
                - GetSystemMetrics(SM_CYFRAME) * 2
                - GetSystemMetrics(SM_CYCAPTION)
#ifdef FEAT_MENU
                - gui_mswin_get_menu_height(FALSE)
#endif
                ;
}


#if defined(FEAT_MENU) || defined(PROTO)
/*
 * Add a sub menu to the menu bar.
 */
    void
gui_mch_add_menu(
    vimmenu_T   *menu,
    int         pos)
{
    vimmenu_T   *parent = menu->parent;

    menu->submenu_id = CreatePopupMenu();
    menu->id = s_menu_id++;

    if (menu_is_menubar(menu->name))
    {
        if (is_winnt_3())
        {
            InsertMenu((parent == NULL) ? s_menuBar : parent->submenu_id,
                    (UINT)pos, MF_POPUP | MF_STRING | MF_BYPOSITION,
                    (long_u)menu->submenu_id, (LPCTSTR) menu->name);
        }
        else
        {
#ifdef FEAT_MBYTE
            WCHAR       *wn = NULL;
            int         n;

            if (enc_codepage >= 0 && (int)GetACP() != enc_codepage)
            {
                /* 'encoding' differs from active codepage: convert menu name
                 * and use wide function */
                wn = enc_to_utf16(menu->name, NULL);
                if (wn != NULL)
                {
                    MENUITEMINFOW       infow;

                    infow.cbSize = sizeof(infow);
                    infow.fMask = MIIM_DATA | MIIM_TYPE | MIIM_ID
                                                               | MIIM_SUBMENU;
                    infow.dwItemData = (long_u)menu;
                    infow.wID = menu->id;
                    infow.fType = MFT_STRING;
                    infow.dwTypeData = wn;
                    infow.cch = (UINT)wcslen(wn);
                    infow.hSubMenu = menu->submenu_id;
                    n = InsertMenuItemW((parent == NULL)
                                            ? s_menuBar : parent->submenu_id,
                                            (UINT)pos, TRUE, &infow);
                    vim_free(wn);
                    if (n == 0 && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
                        /* Failed, try using non-wide function. */
                        wn = NULL;
                }
            }

            if (wn == NULL)
#endif
            {
                MENUITEMINFO    info;

                info.cbSize = sizeof(info);
                info.fMask = MIIM_DATA | MIIM_TYPE | MIIM_ID | MIIM_SUBMENU;
                info.dwItemData = (long_u)menu;
                info.wID = menu->id;
                info.fType = MFT_STRING;
                info.dwTypeData = (LPTSTR)menu->name;
                info.cch = (UINT)STRLEN(menu->name);
                info.hSubMenu = menu->submenu_id;
                InsertMenuItem((parent == NULL)
                                        ? s_menuBar : parent->submenu_id,
                                        (UINT)pos, TRUE, &info);
            }
        }
    }

    /* Fix window size if menu may have wrapped */
    if (parent == NULL)
        gui_mswin_get_menu_height(!gui.starting);
#ifdef FEAT_TEAROFF
    else if (IsWindow(parent->tearoff_handle))
        rebuild_tearoff(parent);
#endif
}

    void
gui_mch_show_popupmenu(vimmenu_T *menu)
{
    POINT mp;

    (void)GetCursorPos((LPPOINT)&mp);
    gui_mch_show_popupmenu_at(menu, (int)mp.x, (int)mp.y);
}

    void
gui_make_popup(char_u *path_name, int mouse_pos)
{
    vimmenu_T   *menu = gui_find_menu(path_name);

    if (menu != NULL)
    {
        POINT   p;

        /* Find the position of the current cursor */
        GetDCOrgEx(s_hdc, &p);
        if (mouse_pos)
        {
            int mx, my;

            gui_mch_getmouse(&mx, &my);
            p.x += mx;
            p.y += my;
        }
        else if (curwin != NULL)
        {
            p.x += TEXT_X(W_WINCOL(curwin) + curwin->w_wcol + 1);
            p.y += TEXT_Y(W_WINROW(curwin) + curwin->w_wrow + 1);
        }
        msg_scroll = FALSE;
        gui_mch_show_popupmenu_at(menu, (int)p.x, (int)p.y);
    }
}

#if defined(FEAT_TEAROFF) || defined(PROTO)
/*
 * Given a menu descriptor, e.g. "File.New", find it in the menu hierarchy and
 * create it as a pseudo-"tearoff menu".
 */
    void
gui_make_tearoff(char_u *path_name)
{
    vimmenu_T   *menu = gui_find_menu(path_name);

    /* Found the menu, so tear it off. */
    if (menu != NULL)
        gui_mch_tearoff(menu->dname, menu, 0xffffL, 0xffffL);
}
#endif

/*
 * Add a menu item to a menu
 */
    void
gui_mch_add_menu_item(
    vimmenu_T   *menu,
    int         idx)
{
    vimmenu_T   *parent = menu->parent;

    menu->id = s_menu_id++;
    menu->submenu_id = NULL;

#ifdef FEAT_TEAROFF
    if (STRNCMP(menu->name, TEAR_STRING, TEAR_LEN) == 0)
    {
        InsertMenu(parent->submenu_id, (UINT)idx, MF_BITMAP|MF_BYPOSITION,
                (UINT)menu->id, (LPCTSTR) s_htearbitmap);
    }
    else
#endif
#ifdef FEAT_TOOLBAR
    if (menu_is_toolbar(parent->name))
    {
        TBBUTTON newtb;

        vim_memset(&newtb, 0, sizeof(newtb));
        if (menu_is_separator(menu->name))
        {
            newtb.iBitmap = 0;
            newtb.fsStyle = TBSTYLE_SEP;
        }
        else
        {
            newtb.iBitmap = get_toolbar_bitmap(menu);
            newtb.fsStyle = TBSTYLE_BUTTON;
        }
        newtb.idCommand = menu->id;
        newtb.fsState = TBSTATE_ENABLED;
        newtb.iString = 0;
        SendMessage(s_toolbarhwnd, TB_INSERTBUTTON, (WPARAM)idx,
                                                             (LPARAM)&newtb);
        menu->submenu_id = (HMENU)-1;
    }
    else
#endif
    {
#ifdef FEAT_MBYTE
        WCHAR   *wn = NULL;
        int     n;

        if (enc_codepage >= 0 && (int)GetACP() != enc_codepage)
        {
            /* 'encoding' differs from active codepage: convert menu item name
             * and use wide function */
            wn = enc_to_utf16(menu->name, NULL);
            if (wn != NULL)
            {
                n = InsertMenuW(parent->submenu_id, (UINT)idx,
                        (menu_is_separator(menu->name)
                                 ? MF_SEPARATOR : MF_STRING) | MF_BYPOSITION,
                        (UINT)menu->id, wn);
                vim_free(wn);
                if (n == 0 && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
                    /* Failed, try using non-wide function. */
                    wn = NULL;
            }
        }
        if (wn == NULL)
#endif
            InsertMenu(parent->submenu_id, (UINT)idx,
                (menu_is_separator(menu->name) ? MF_SEPARATOR : MF_STRING)
                                                              | MF_BYPOSITION,
                (UINT)menu->id, (LPCTSTR)menu->name);
#ifdef FEAT_TEAROFF
        if (IsWindow(parent->tearoff_handle))
            rebuild_tearoff(parent);
#endif
    }
}

/*
 * Destroy the machine specific menu widget.
 */
    void
gui_mch_destroy_menu(vimmenu_T *menu)
{
#ifdef FEAT_TOOLBAR
    /*
     * is this a toolbar button?
     */
    if (menu->submenu_id == (HMENU)-1)
    {
        int iButton;

        iButton = (int)SendMessage(s_toolbarhwnd, TB_COMMANDTOINDEX,
                                                         (WPARAM)menu->id, 0);
        SendMessage(s_toolbarhwnd, TB_DELETEBUTTON, (WPARAM)iButton, 0);
    }
    else
#endif
    {
        if (menu->parent != NULL
                && menu_is_popup(menu->parent->dname)
                && menu->parent->submenu_id != NULL)
            RemoveMenu(menu->parent->submenu_id, menu->id, MF_BYCOMMAND);
        else
            RemoveMenu(s_menuBar, menu->id, MF_BYCOMMAND);
        if (menu->submenu_id != NULL)
            DestroyMenu(menu->submenu_id);
#ifdef FEAT_TEAROFF
        if (IsWindow(menu->tearoff_handle))
            DestroyWindow(menu->tearoff_handle);
        if (menu->parent != NULL
                && menu->parent->children != NULL
                && IsWindow(menu->parent->tearoff_handle))
        {
            /* This menu must not show up when rebuilding the tearoff window. */
            menu->modes = 0;
            rebuild_tearoff(menu->parent);
        }
#endif
    }
}

#ifdef FEAT_TEAROFF
    static void
rebuild_tearoff(vimmenu_T *menu)
{
    /*hackish*/
    char_u      tbuf[128];
    RECT        trect;
    RECT        rct;
    RECT        roct;
    int         x, y;

    HWND thwnd = menu->tearoff_handle;

    GetWindowText(thwnd, tbuf, 127);
    if (GetWindowRect(thwnd, &trect)
            && GetWindowRect(s_hwnd, &rct)
            && GetClientRect(s_hwnd, &roct))
    {
        x = trect.left - rct.left;
        y = (trect.top -  rct.bottom  + roct.bottom);
    }
    else
    {
        x = y = 0xffffL;
    }
    DestroyWindow(thwnd);
    if (menu->children != NULL)
    {
        gui_mch_tearoff(tbuf, menu, x, y);
        if (IsWindow(menu->tearoff_handle))
            (void) SetWindowPos(menu->tearoff_handle,
                                NULL,
                                (int)trect.left,
                                (int)trect.top,
                                0, 0,
                                SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
    }
}
#endif /* FEAT_TEAROFF */

/*
 * Make a menu either grey or not grey.
 */
    void
gui_mch_menu_grey(
    vimmenu_T   *menu,
    int     grey)
{
#ifdef FEAT_TOOLBAR
    /*
     * is this a toolbar button?
     */
    if (menu->submenu_id == (HMENU)-1)
    {
        SendMessage(s_toolbarhwnd, TB_ENABLEBUTTON,
            (WPARAM)menu->id, (LPARAM) MAKELONG((grey ? FALSE : TRUE), 0) );
    }
    else
#endif
    if (grey)
        EnableMenuItem(s_menuBar, menu->id, MF_BYCOMMAND | MF_GRAYED);
    else
        EnableMenuItem(s_menuBar, menu->id, MF_BYCOMMAND | MF_ENABLED);

#ifdef FEAT_TEAROFF
    if ((menu->parent != NULL) && (IsWindow(menu->parent->tearoff_handle)))
    {
        WORD menuID;
        HWND menuHandle;

        /*
         * A tearoff button has changed state.
         */
        if (menu->children == NULL)
            menuID = (WORD)(menu->id);
        else
            menuID = (WORD)((long_u)(menu->submenu_id) | (DWORD)0x8000);
        menuHandle = GetDlgItem(menu->parent->tearoff_handle, menuID);
        if (menuHandle)
            EnableWindow(menuHandle, !grey);

    }
#endif
}

#endif /* FEAT_MENU */


/* define some macros used to make the dialogue creation more readable */

#define add_string(s) strcpy((LPSTR)p, s); (LPSTR)p += (strlen((LPSTR)p) + 1)
#define add_word(x)             *p++ = (x)
#define add_long(x)             dwp = (DWORD *)p; *dwp++ = (x); p = (WORD *)dwp

#if defined(FEAT_GUI_DIALOG) || defined(PROTO)
/*
 * stuff for dialogs
 */

/*
 * The callback routine used by all the dialogs.  Very simple.  First,
 * acknowledges the INITDIALOG message so that Windows knows to do standard
 * dialog stuff (Return = default, Esc = cancel....) Second, if a button is
 * pressed, return that button's ID - IDCANCEL (2), which is the button's
 * number.
 */
/*ARGSUSED*/
    static LRESULT CALLBACK
dialog_callback(
    HWND hwnd,
    UINT message,
    WPARAM wParam,
    LPARAM lParam)
{
    if (message == WM_INITDIALOG)
    {
        CenterWindow(hwnd, GetWindow(hwnd, GW_OWNER));
        /* Set focus to the dialog.  Set the default button, if specified. */
        (void)SetFocus(hwnd);
        if (dialog_default_button > IDCANCEL)
            (void)SetFocus(GetDlgItem(hwnd, dialog_default_button));
        else
            /* We don't have a default, set focus on another element of the
             * dialog window, probably the icon */
            (void)SetFocus(GetDlgItem(hwnd, DLG_NONBUTTON_CONTROL));
        return FALSE;
    }

    if (message == WM_COMMAND)
    {
        int     button = LOWORD(wParam);

        /* Don't end the dialog if something was selected that was
         * not a button.
         */
        if (button >= DLG_NONBUTTON_CONTROL)
            return TRUE;

        /* If the edit box exists, copy the string. */
        if (s_textfield != NULL)
        {
# if defined(FEAT_MBYTE) && defined(WIN3264)
            /* If the OS is Windows NT, and 'encoding' differs from active
             * codepage: use wide function and convert text. */
            if (os_version.dwPlatformId == VER_PLATFORM_WIN32_NT
                    && enc_codepage >= 0 && (int)GetACP() != enc_codepage)
            {
               WCHAR  *wp = (WCHAR *)alloc(IOSIZE * sizeof(WCHAR));
               char_u *p;

               GetDlgItemTextW(hwnd, DLG_NONBUTTON_CONTROL + 2, wp, IOSIZE);
               p = utf16_to_enc(wp, NULL);
               vim_strncpy(s_textfield, p, IOSIZE);
               vim_free(p);
               vim_free(wp);
            }
            else
# endif
                GetDlgItemText(hwnd, DLG_NONBUTTON_CONTROL + 2,
                                                         s_textfield, IOSIZE);
        }

        /*
         * Need to check for IDOK because if the user just hits Return to
         * accept the default value, some reason this is what we get.
         */
        if (button == IDOK)
        {
            if (dialog_default_button > IDCANCEL)
                EndDialog(hwnd, dialog_default_button);
        }
        else
            EndDialog(hwnd, button - IDCANCEL);
        return TRUE;
    }

    if ((message == WM_SYSCOMMAND) && (wParam == SC_CLOSE))
    {
        EndDialog(hwnd, 0);
        return TRUE;
    }
    return FALSE;
}

/*
 * Create a dialog dynamically from the parameter strings.
 * type         = type of dialog (question, alert, etc.)
 * title        = dialog title. may be NULL for default title.
 * message      = text to display. Dialog sizes to accommodate it.
 * buttons      = '\n' separated list of button captions, default first.
 * dfltbutton   = number of default button.
 *
 * This routine returns 1 if the first button is pressed,
 *                      2 for the second, etc.
 *
 *                      0 indicates Esc was pressed.
 *                      -1 for unexpected error
 *
 * If stubbing out this fn, return 1.
 */

static const char_u *dlg_icons[] = /* must match names in resource file */
{
    "IDR_VIM",
    "IDR_VIM_ERROR",
    "IDR_VIM_ALERT",
    "IDR_VIM_INFO",
    "IDR_VIM_QUESTION"
};

    int
gui_mch_dialog(
    int          type,
    char_u      *title,
    char_u      *message,
    char_u      *buttons,
    int          dfltbutton,
    char_u      *textfield)
{
    WORD        *p, *pdlgtemplate, *pnumitems;
    DWORD       *dwp;
    int         numButtons;
    int         *buttonWidths, *buttonPositions;
    int         buttonYpos;
    int         nchar, i;
    DWORD       lStyle;
    int         dlgwidth = 0;
    int         dlgheight;
    int         editboxheight;
    int         horizWidth = 0;
    int         msgheight;
    char_u      *pstart;
    char_u      *pend;
    char_u      *last_white;
    char_u      *tbuffer;
    RECT        rect;
    HWND        hwnd;
    HDC         hdc;
    HFONT       font, oldFont;
    TEXTMETRIC  fontInfo;
    int         fontHeight;
    int         textWidth, minButtonWidth, messageWidth;
    int         maxDialogWidth;
    int         maxDialogHeight;
    int         scroll_flag = 0;
    int         vertical;
    int         dlgPaddingX;
    int         dlgPaddingY;
#ifdef USE_SYSMENU_FONT
    LOGFONT     lfSysmenu;
    int         use_lfSysmenu = FALSE;
#endif
    garray_T    ga;
    int         l;

#ifndef NO_CONSOLE
    /* Don't output anything in silent mode ("ex -s") */
    if (silent_mode)
        return dfltbutton;   /* return default option */
#endif

#if 0
    /* If there is no window yet, open it. */
    if (s_hwnd == NULL && gui_mch_init() == FAIL)
        return dfltbutton;
#else
    if (s_hwnd == NULL)
        get_dialog_font_metrics();
#endif

    if ((type < 0) || (type > VIM_LAST_TYPE))
        type = 0;

    /* allocate some memory for dialog template */
    /* TODO should compute this really */
    pdlgtemplate = p = (PWORD)LocalAlloc(LPTR,
                                        DLG_ALLOC_SIZE + STRLEN(message) * 2);

    if (p == NULL)
        return -1;

    /*
     * make a copy of 'buttons' to fiddle with it.  complier grizzles because
     * vim_strsave() doesn't take a const arg (why not?), so cast away the
     * const.
     */
    tbuffer = vim_strsave(buttons);
    if (tbuffer == NULL)
        return -1;

    --dfltbutton;   /* Change from one-based to zero-based */

    /* Count buttons */
    numButtons = 1;
    for (i = 0; tbuffer[i] != '\0'; i++)
    {
        if (tbuffer[i] == DLG_BUTTON_SEP)
            numButtons++;
    }
    if (dfltbutton >= numButtons)
        dfltbutton = -1;

    /* Allocate array to hold the width of each button */
    buttonWidths = (int *)lalloc(numButtons * sizeof(int), TRUE);
    if (buttonWidths == NULL)
        return -1;

    /* Allocate array to hold the X position of each button */
    buttonPositions = (int *)lalloc(numButtons * sizeof(int), TRUE);
    if (buttonPositions == NULL)
        return -1;

    /*
     * Calculate how big the dialog must be.
     */
    hwnd = GetDesktopWindow();
    hdc = GetWindowDC(hwnd);
#ifdef USE_SYSMENU_FONT
    if (gui_w32_get_menu_font(&lfSysmenu) == OK)
    {
        font = CreateFontIndirect(&lfSysmenu);
        use_lfSysmenu = TRUE;
    }
    else
#endif
    font = CreateFont(-DLG_FONT_POINT_SIZE, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                      VARIABLE_PITCH , DLG_FONT_NAME);
    if (s_usenewlook)
    {
        oldFont = SelectFont(hdc, font);
        dlgPaddingX = DLG_PADDING_X;
        dlgPaddingY = DLG_PADDING_Y;
    }
    else
    {
        oldFont = SelectFont(hdc, GetStockObject(SYSTEM_FONT));
        dlgPaddingX = DLG_OLD_STYLE_PADDING_X;
        dlgPaddingY = DLG_OLD_STYLE_PADDING_Y;
    }
    GetTextMetrics(hdc, &fontInfo);
    fontHeight = fontInfo.tmHeight;

    /* Minimum width for horizontal button */
    minButtonWidth = GetTextWidth(hdc, "Cancel", 6);

    /* Maximum width of a dialog, if possible */
    if (s_hwnd == NULL)
    {
        RECT    workarea_rect;

        /* We don't have a window, use the desktop area. */
        get_work_area(&workarea_rect);
        maxDialogWidth = workarea_rect.right - workarea_rect.left - 100;
        if (maxDialogWidth > 600)
            maxDialogWidth = 600;
        maxDialogHeight = workarea_rect.bottom - workarea_rect.top - 100;
    }
    else
    {
        /* Use our own window for the size, unless it's very small. */
        GetWindowRect(s_hwnd, &rect);
        maxDialogWidth = rect.right - rect.left
                                           - GetSystemMetrics(SM_CXFRAME) * 2;
        if (maxDialogWidth < DLG_MIN_MAX_WIDTH)
            maxDialogWidth = DLG_MIN_MAX_WIDTH;

        maxDialogHeight = rect.bottom - rect.top
                                           - GetSystemMetrics(SM_CXFRAME) * 2;
        if (maxDialogHeight < DLG_MIN_MAX_HEIGHT)
            maxDialogHeight = DLG_MIN_MAX_HEIGHT;
    }

    /* Set dlgwidth to width of message.
     * Copy the message into "ga", changing NL to CR-NL and inserting line
     * breaks where needed. */
    pstart = message;
    messageWidth = 0;
    msgheight = 0;
    ga_init2(&ga, sizeof(char), 500);
    do
    {
        msgheight += fontHeight;    /* at least one line */

        /* Need to figure out where to break the string.  The system does it
         * at a word boundary, which would mean we can't compute the number of
         * wrapped lines. */
        textWidth = 0;
        last_white = NULL;
        for (pend = pstart; *pend != NUL && *pend != '\n'; )
        {
#ifdef FEAT_MBYTE
            l = (*mb_ptr2len)(pend);
#else
            l = 1;
#endif
            if (l == 1 && vim_iswhite(*pend)
                                        && textWidth > maxDialogWidth * 3 / 4)
                last_white = pend;
            textWidth += GetTextWidth(hdc, pend, l);
            if (textWidth >= maxDialogWidth)
            {
                /* Line will wrap. */
                messageWidth = maxDialogWidth;
                msgheight += fontHeight;
                textWidth = 0;

                if (last_white != NULL)
                {
                    /* break the line just after a space */
                    ga.ga_len -= (int)(pend - (last_white + 1));
                    pend = last_white + 1;
                    last_white = NULL;
                }
                ga_append(&ga, '\r');
                ga_append(&ga, '\n');
                continue;
            }

            while (--l >= 0)
                ga_append(&ga, *pend++);
        }
        if (textWidth > messageWidth)
            messageWidth = textWidth;

        ga_append(&ga, '\r');
        ga_append(&ga, '\n');
        pstart = pend + 1;
    } while (*pend != NUL);

    if (ga.ga_data != NULL)
        message = ga.ga_data;

    messageWidth += 10;         /* roundoff space */

    /* Restrict the size to a maximum.  Causes a scrollbar to show up. */
    if (msgheight > maxDialogHeight)
    {
        msgheight = maxDialogHeight;
        scroll_flag = WS_VSCROLL;
        messageWidth += GetSystemMetrics(SM_CXVSCROLL);
    }

    /* Add width of icon to dlgwidth, and some space */
    dlgwidth = messageWidth + DLG_ICON_WIDTH + 3 * dlgPaddingX;

    if (msgheight < DLG_ICON_HEIGHT)
        msgheight = DLG_ICON_HEIGHT;

    /*
     * Check button names.  A long one will make the dialog wider.
     * When called early (-register error message) p_go isn't initialized.
     */
    vertical = (p_go != NULL && vim_strchr(p_go, GO_VERTICAL) != NULL);
    if (!vertical)
    {
        // Place buttons horizontally if they fit.
        horizWidth = dlgPaddingX;
        pstart = tbuffer;
        i = 0;
        do
        {
            pend = vim_strchr(pstart, DLG_BUTTON_SEP);
            if (pend == NULL)
                pend = pstart + STRLEN(pstart); // Last button name.
            textWidth = GetTextWidth(hdc, pstart, (int)(pend - pstart));
            if (textWidth < minButtonWidth)
                textWidth = minButtonWidth;
            textWidth += dlgPaddingX;       /* Padding within button */
            buttonWidths[i] = textWidth;
            buttonPositions[i++] = horizWidth;
            horizWidth += textWidth + dlgPaddingX; /* Pad between buttons */
            pstart = pend + 1;
        } while (*pend != NUL);

        if (horizWidth > maxDialogWidth)
            vertical = TRUE;    // Too wide to fit on the screen.
        else if (horizWidth > dlgwidth)
            dlgwidth = horizWidth;
    }

    if (vertical)
    {
        // Stack buttons vertically.
        pstart = tbuffer;
        do
        {
            pend = vim_strchr(pstart, DLG_BUTTON_SEP);
            if (pend == NULL)
                pend = pstart + STRLEN(pstart); // Last button name.
            textWidth = GetTextWidth(hdc, pstart, (int)(pend - pstart));
            textWidth += dlgPaddingX;           /* Padding within button */
            textWidth += DLG_VERT_PADDING_X * 2; /* Padding around button */
            if (textWidth > dlgwidth)
                dlgwidth = textWidth;
            pstart = pend + 1;
        } while (*pend != NUL);
    }

    if (dlgwidth < DLG_MIN_WIDTH)
        dlgwidth = DLG_MIN_WIDTH;       /* Don't allow a really thin dialog!*/

    /* start to fill in the dlgtemplate information.  addressing by WORDs */
    if (s_usenewlook)
        lStyle = DS_MODALFRAME | WS_CAPTION |DS_3DLOOK| WS_VISIBLE |DS_SETFONT;
    else
        lStyle = DS_MODALFRAME | WS_CAPTION |DS_3DLOOK| WS_VISIBLE;

    add_long(lStyle);
    add_long(0);        // (lExtendedStyle)
    pnumitems = p;      /*save where the number of items must be stored*/
    add_word(0);        // NumberOfItems(will change later)
    add_word(10);       // x
    add_word(10);       // y
    add_word(PixelToDialogX(dlgwidth)); // cx

    // Dialog height.
    if (vertical)
        dlgheight = msgheight + 2 * dlgPaddingY +
                              DLG_VERT_PADDING_Y + 2 * fontHeight * numButtons;
    else
        dlgheight = msgheight + 3 * dlgPaddingY + 2 * fontHeight;

    // Dialog needs to be taller if contains an edit box.
    editboxheight = fontHeight + dlgPaddingY + 4 * DLG_VERT_PADDING_Y;
    if (textfield != NULL)
        dlgheight += editboxheight;

    add_word(PixelToDialogY(dlgheight));

    add_word(0);        // Menu
    add_word(0);        // Class

    /* copy the title of the dialog */
    nchar = nCopyAnsiToWideChar(p, (title ?
                                    (LPSTR)title :
                                    (LPSTR)("Vim "VIM_VERSION_MEDIUM)));
    p += nchar;

    if (s_usenewlook)
    {
        /* do the font, since DS_3DLOOK doesn't work properly */
#ifdef USE_SYSMENU_FONT
        if (use_lfSysmenu)
        {
            /* point size */
            *p++ = -MulDiv(lfSysmenu.lfHeight, 72,
                    GetDeviceCaps(hdc, LOGPIXELSY));
            nchar = nCopyAnsiToWideChar(p, TEXT(lfSysmenu.lfFaceName));
        }
        else
#endif
        {
            *p++ = DLG_FONT_POINT_SIZE;         // point size
            nchar = nCopyAnsiToWideChar(p, TEXT(DLG_FONT_NAME));
        }
        p += nchar;
    }

    buttonYpos = msgheight + 2 * dlgPaddingY;

    if (textfield != NULL)
        buttonYpos += editboxheight;

    pstart = tbuffer;
    if (!vertical)
        horizWidth = (dlgwidth - horizWidth) / 2;       /* Now it's X offset */
    for (i = 0; i < numButtons; i++)
    {
        /* get end of this button. */
        for (   pend = pstart;
                *pend && (*pend != DLG_BUTTON_SEP);
                pend++)
            ;

        if (*pend)
            *pend = '\0';

        /*
         * old NOTE:
         * setting the BS_DEFPUSHBUTTON style doesn't work because Windows sets
         * the focus to the first tab-able button and in so doing makes that
         * the default!! Grrr.  Workaround: Make the default button the only
         * one with WS_TABSTOP style. Means user can't tab between buttons, but
         * he/she can use arrow keys.
         *
         * new NOTE: BS_DEFPUSHBUTTON is required to be able to select the
         * right button when hitting <Enter>.  E.g., for the ":confirm quit"
         * dialog.  Also needed for when the textfield is the default control.
         * It appears to work now (perhaps not on Win95?).
         */
        if (vertical)
        {
            p = add_dialog_element(p,
                    (i == dfltbutton
                            ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON) | WS_TABSTOP,
                    PixelToDialogX(DLG_VERT_PADDING_X),
                    PixelToDialogY(buttonYpos /* TBK */
                                   + 2 * fontHeight * i),
                    PixelToDialogX(dlgwidth - 2 * DLG_VERT_PADDING_X),
                    (WORD)(PixelToDialogY(2 * fontHeight) - 1),
                    (WORD)(IDCANCEL + 1 + i), (WORD)0x0080, pstart);
        }
        else
        {
            p = add_dialog_element(p,
                    (i == dfltbutton
                            ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON) | WS_TABSTOP,
                    PixelToDialogX(horizWidth + buttonPositions[i]),
                    PixelToDialogY(buttonYpos), /* TBK */
                    PixelToDialogX(buttonWidths[i]),
                    (WORD)(PixelToDialogY(2 * fontHeight) - 1),
                    (WORD)(IDCANCEL + 1 + i), (WORD)0x0080, pstart);
        }
        pstart = pend + 1;      /*next button*/
    }
    *pnumitems += numButtons;

    /* Vim icon */
    p = add_dialog_element(p, SS_ICON,
            PixelToDialogX(dlgPaddingX),
            PixelToDialogY(dlgPaddingY),
            PixelToDialogX(DLG_ICON_WIDTH),
            PixelToDialogY(DLG_ICON_HEIGHT),
            DLG_NONBUTTON_CONTROL + 0, (WORD)0x0082,
            dlg_icons[type]);

#if 0
    /* Dialog message */
    p = add_dialog_element(p, SS_LEFT,
            PixelToDialogX(2 * dlgPaddingX + DLG_ICON_WIDTH),
            PixelToDialogY(dlgPaddingY),
            (WORD)(PixelToDialogX(messageWidth) + 1),
            PixelToDialogY(msgheight),
            DLG_NONBUTTON_CONTROL + 1, (WORD)0x0082, message);
#else
    /* Dialog message */
    p = add_dialog_element(p, ES_LEFT|scroll_flag|ES_MULTILINE|ES_READONLY,
            PixelToDialogX(2 * dlgPaddingX + DLG_ICON_WIDTH),
            PixelToDialogY(dlgPaddingY),
            (WORD)(PixelToDialogX(messageWidth) + 1),
            PixelToDialogY(msgheight),
            DLG_NONBUTTON_CONTROL + 1, (WORD)0x0081, message);
#endif

    /* Edit box */
    if (textfield != NULL)
    {
        p = add_dialog_element(p, ES_LEFT|ES_AUTOHSCROLL|WS_TABSTOP|WS_BORDER,
                PixelToDialogX(2 * dlgPaddingX),
                PixelToDialogY(2 * dlgPaddingY + msgheight),
                PixelToDialogX(dlgwidth - 4 * dlgPaddingX),
                PixelToDialogY(fontHeight + dlgPaddingY),
                DLG_NONBUTTON_CONTROL + 2, (WORD)0x0081, textfield);
        *pnumitems += 1;
    }

    *pnumitems += 2;

    SelectFont(hdc, oldFont);
    DeleteObject(font);
    ReleaseDC(hwnd, hdc);

    /* Let the dialog_callback() function know which button to make default
     * If we have an edit box, make that the default. We also need to tell
     * dialog_callback() if this dialog contains an edit box or not. We do
     * this by setting s_textfield if it does.
     */
    if (textfield != NULL)
    {
        dialog_default_button = DLG_NONBUTTON_CONTROL + 2;
        s_textfield = textfield;
    }
    else
    {
        dialog_default_button = IDCANCEL + 1 + dfltbutton;
        s_textfield = NULL;
    }

    /* show the dialog box modally and get a return value */
    nchar = (int)DialogBoxIndirect(
            s_hinst,
            (LPDLGTEMPLATE)pdlgtemplate,
            s_hwnd,
            (DLGPROC)dialog_callback);

    LocalFree(LocalHandle(pdlgtemplate));
    vim_free(tbuffer);
    vim_free(buttonWidths);
    vim_free(buttonPositions);
    vim_free(ga.ga_data);

    /* Focus back to our window (for when MDI is used). */
    (void)SetFocus(s_hwnd);

    return nchar;
}

#endif /* FEAT_GUI_DIALOG */

/*
 * Put a simple element (basic class) onto a dialog template in memory.
 * return a pointer to where the next item should be added.
 *
 * parameters:
 *  lStyle = additional style flags
 *              (be careful, NT3.51 & Win32s will ignore the new ones)
 *  x,y = x & y positions IN DIALOG UNITS
 *  w,h = width and height IN DIALOG UNITS
 *  Id  = ID used in messages
 *  clss  = class ID, e.g 0x0080 for a button, 0x0082 for a static
 *  caption = usually text or resource name
 *
 *  TODO: use the length information noted here to enable the dialog creation
 *  routines to work out more exactly how much memory they need to alloc.
 */
    static PWORD
add_dialog_element(
    PWORD p,
    DWORD lStyle,
    WORD x,
    WORD y,
    WORD w,
    WORD h,
    WORD Id,
    WORD clss,
    const char *caption)
{
    int nchar;

    p = lpwAlign(p);    /* Align to dword boundary*/
    lStyle = lStyle | WS_VISIBLE | WS_CHILD;
    *p++ = LOWORD(lStyle);
    *p++ = HIWORD(lStyle);
    *p++ = 0;           // LOWORD (lExtendedStyle)
    *p++ = 0;           // HIWORD (lExtendedStyle)
    *p++ = x;
    *p++ = y;
    *p++ = w;
    *p++ = h;
    *p++ = Id;          //9 or 10 words in all

    *p++ = (WORD)0xffff;
    *p++ = clss;                        //2 more here

    nchar = nCopyAnsiToWideChar(p, (LPSTR)caption); //strlen(caption)+1
    p += nchar;

    *p++ = 0;  // advance pointer over nExtraStuff WORD   - 2 more

    return p;   //total = 15+ (strlen(caption)) words
                //         = 30 + 2(strlen(caption) bytes reqd
}


/*
 * Helper routine.  Take an input pointer, return closest pointer that is
 * aligned on a DWORD (4 byte) boundary.  Taken from the Win32SDK samples.
 */
    static LPWORD
lpwAlign(
    LPWORD lpIn)
{
    long_u ul;

    ul = (long_u)lpIn;
    ul += 3;
    ul >>= 2;
    ul <<= 2;
    return (LPWORD)ul;
}

/*
 * Helper routine.  Takes second parameter as Ansi string, copies it to first
 * parameter as wide character (16-bits / char) string, and returns integer
 * number of wide characters (words) in string (including the trailing wide
 * char NULL).  Partly taken from the Win32SDK samples.
 */
    static int
nCopyAnsiToWideChar(
    LPWORD lpWCStr,
    LPSTR lpAnsiIn)
{
    int         nChar = 0;
#ifdef FEAT_MBYTE
    int         len = lstrlen(lpAnsiIn) + 1;    /* include NUL character */
    int         i;
    WCHAR       *wn;

    if (enc_codepage == 0 && (int)GetACP() != enc_codepage)
    {
        /* Not a codepage, use our own conversion function. */
        wn = enc_to_utf16(lpAnsiIn, NULL);
        if (wn != NULL)
        {
            wcscpy(lpWCStr, wn);
            nChar = (int)wcslen(wn) + 1;
            vim_free(wn);
        }
    }
    if (nChar == 0)
        /* Use Win32 conversion function. */
        nChar = MultiByteToWideChar(
                enc_codepage > 0 ? enc_codepage : CP_ACP,
                MB_PRECOMPOSED,
                lpAnsiIn, len,
                lpWCStr, len);
    for (i = 0; i < nChar; ++i)
        if (lpWCStr[i] == (WORD)'\t')   /* replace tabs with spaces */
            lpWCStr[i] = (WORD)' ';
#else
    do
    {
        if (*lpAnsiIn == '\t')
            *lpWCStr++ = (WORD)' ';
        else
            *lpWCStr++ = (WORD)*lpAnsiIn;
        nChar++;
    } while (*lpAnsiIn++);
#endif

    return nChar;
}


#ifdef FEAT_TEAROFF
/*
 * The callback function for all the modeless dialogs that make up the
 * "tearoff menus" Very simple - forward button presses (to fool Vim into
 * thinking its menus have been clicked), and go away when closed.
 */
    static LRESULT CALLBACK
tearoff_callback(
    HWND hwnd,
    UINT message,
    WPARAM wParam,
    LPARAM lParam)
{
    if (message == WM_INITDIALOG)
        return (TRUE);

    /* May show the mouse pointer again. */
    HandleMouseHide(message, lParam);

    if (message == WM_COMMAND)
    {
        if ((WORD)(LOWORD(wParam)) & 0x8000)
        {
            POINT   mp;
            RECT    rect;

            if (GetCursorPos(&mp) && GetWindowRect(hwnd, &rect))
            {
                (void)TrackPopupMenu(
                         (HMENU)(long_u)(LOWORD(wParam) ^ 0x8000),
                         TPM_LEFTALIGN | TPM_LEFTBUTTON,
                         (int)rect.right - 8,
                         (int)mp.y,
                         (int)0,            /*reserved param*/
                         s_hwnd,
                         NULL);
                /*
                 * NOTE: The pop-up menu can eat the mouse up event.
                 * We deal with this in normal.c.
                 */
            }
        }
        else
            /* Pass on messages to the main Vim window */
            PostMessage(s_hwnd, WM_COMMAND, LOWORD(wParam), 0);
        /*
         * Give main window the focus back: this is so after
         * choosing a tearoff button you can start typing again
         * straight away.
         */
        (void)SetFocus(s_hwnd);
        return TRUE;
    }
    if ((message == WM_SYSCOMMAND) && (wParam == SC_CLOSE))
    {
        DestroyWindow(hwnd);
        return TRUE;
    }

    /* When moved around, give main window the focus back. */
    if (message == WM_EXITSIZEMOVE)
        (void)SetActiveWindow(s_hwnd);

    return FALSE;
}
#endif


/*
 * Decide whether to use the "new look" (small, non-bold font) or the "old
 * look" (big, clanky font) for dialogs, and work out a few values for use
 * later accordingly.
 */
    static void
get_dialog_font_metrics(void)
{
    HDC             hdc;
    HFONT           hfontTools = 0;
    DWORD           dlgFontSize;
    SIZE            size;
#ifdef USE_SYSMENU_FONT
    LOGFONT         lfSysmenu;
#endif

    s_usenewlook = FALSE;

    /*
     * For NT3.51 and Win32s, we stick with the old look
     * because it matches everything else.
     */
    if (!is_winnt_3())
    {
#ifdef USE_SYSMENU_FONT
        if (gui_w32_get_menu_font(&lfSysmenu) == OK)
            hfontTools = CreateFontIndirect(&lfSysmenu);
        else
#endif
        hfontTools = CreateFont(-DLG_FONT_POINT_SIZE, 0, 0, 0, 0, 0, 0, 0,
                                0, 0, 0, 0, VARIABLE_PITCH , DLG_FONT_NAME);

        if (hfontTools)
        {
            hdc = GetDC(s_hwnd);
            SelectObject(hdc, hfontTools);
            /*
             * GetTextMetrics() doesn't return the right value in
             * tmAveCharWidth, so we have to figure out the dialog base units
             * ourselves.
             */
            GetTextExtentPoint(hdc,
                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
                    52, &size);
            ReleaseDC(s_hwnd, hdc);

            s_dlgfntwidth = (WORD)((size.cx / 26 + 1) / 2);
            s_dlgfntheight = (WORD)size.cy;
            s_usenewlook = TRUE;
        }
    }

    if (!s_usenewlook)
    {
        dlgFontSize = GetDialogBaseUnits();     /* fall back to big old system*/
        s_dlgfntwidth = LOWORD(dlgFontSize);
        s_dlgfntheight = HIWORD(dlgFontSize);
    }
}

#if defined(FEAT_MENU) && defined(FEAT_TEAROFF)
/*
 * Create a pseudo-"tearoff menu" based on the child
 * items of a given menu pointer.
 */
    static void
gui_mch_tearoff(
    char_u      *title,
    vimmenu_T   *menu,
    int         initX,
    int         initY)
{
    WORD        *p, *pdlgtemplate, *pnumitems, *ptrueheight;
    int         template_len;
    int         nchar, textWidth, submenuWidth;
    DWORD       lStyle;
    DWORD       lExtendedStyle;
    WORD        dlgwidth;
    WORD        menuID;
    vimmenu_T   *pmenu;
    vimmenu_T   *the_menu = menu;
    HWND        hwnd;
    HDC         hdc;
    HFONT       font, oldFont;
    int         col, spaceWidth, len;
    int         columnWidths[2];
    char_u      *label, *text;
    int         acLen = 0;
    int         nameLen;
    int         padding0, padding1, padding2 = 0;
    int         sepPadding=0;
    int         x;
    int         y;
#ifdef USE_SYSMENU_FONT
    LOGFONT     lfSysmenu;
    int         use_lfSysmenu = FALSE;
#endif

    /*
     * If this menu is already torn off, move it to the mouse position.
     */
    if (IsWindow(menu->tearoff_handle))
    {
        POINT mp;
        if (GetCursorPos((LPPOINT)&mp))
        {
            SetWindowPos(menu->tearoff_handle, NULL, mp.x, mp.y, 0, 0,
                    SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOZORDER);
        }
        return;
    }

    /*
     * Create a new tearoff.
     */
    if (*title == MNU_HIDDEN_CHAR)
        title++;

    /* Allocate memory to store the dialog template.  It's made bigger when
     * needed. */
    template_len = DLG_ALLOC_SIZE;
    pdlgtemplate = p = (WORD *)LocalAlloc(LPTR, template_len);
    if (p == NULL)
        return;

    hwnd = GetDesktopWindow();
    hdc = GetWindowDC(hwnd);
#ifdef USE_SYSMENU_FONT
    if (gui_w32_get_menu_font(&lfSysmenu) == OK)
    {
        font = CreateFontIndirect(&lfSysmenu);
        use_lfSysmenu = TRUE;
    }
    else
#endif
    font = CreateFont(-DLG_FONT_POINT_SIZE, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                      VARIABLE_PITCH , DLG_FONT_NAME);
    if (s_usenewlook)
        oldFont = SelectFont(hdc, font);
    else
        oldFont = SelectFont(hdc, GetStockObject(SYSTEM_FONT));

    /* Calculate width of a single space.  Used for padding columns to the
     * right width. */
    spaceWidth = GetTextWidth(hdc, " ", 1);

    /* Figure out max width of the text column, the accelerator column and the
     * optional submenu column. */
    submenuWidth = 0;
    for (col = 0; col < 2; col++)
    {
        columnWidths[col] = 0;
        for (pmenu = menu->children; pmenu != NULL; pmenu = pmenu->next)
        {
            /* Use "dname" here to compute the width of the visible text. */
            text = (col == 0) ? pmenu->dname : pmenu->actext;
            if (text != NULL && *text != NUL)
            {
                textWidth = GetTextWidthEnc(hdc, text, (int)STRLEN(text));
                if (textWidth > columnWidths[col])
                    columnWidths[col] = textWidth;
            }
            if (pmenu->children != NULL)
                submenuWidth = TEAROFF_COLUMN_PADDING * spaceWidth;
        }
    }
    if (columnWidths[1] == 0)
    {
        /* no accelerators */
        if (submenuWidth != 0)
            columnWidths[0] += submenuWidth;
        else
            columnWidths[0] += spaceWidth;
    }
    else
    {
        /* there is an accelerator column */
        columnWidths[0] += TEAROFF_COLUMN_PADDING * spaceWidth;
        columnWidths[1] += submenuWidth;
    }

    /*
     * Now find the total width of our 'menu'.
     */
    textWidth = columnWidths[0] + columnWidths[1];
    if (submenuWidth != 0)
    {
        submenuWidth = GetTextWidth(hdc, TEAROFF_SUBMENU_LABEL,
                                          (int)STRLEN(TEAROFF_SUBMENU_LABEL));
        textWidth += submenuWidth;
    }
    dlgwidth = GetTextWidthEnc(hdc, title, (int)STRLEN(title));
    if (textWidth > dlgwidth)
        dlgwidth = textWidth;
    dlgwidth += 2 * TEAROFF_PADDING_X + TEAROFF_BUTTON_PAD_X;

    /* W95 can't do thin dialogs, they look v. weird! */
    if (mch_windows95() && dlgwidth < TEAROFF_MIN_WIDTH)
        dlgwidth = TEAROFF_MIN_WIDTH;

    /* start to fill in the dlgtemplate information.  addressing by WORDs */
    if (s_usenewlook)
        lStyle = DS_MODALFRAME | WS_CAPTION| WS_SYSMENU |DS_SETFONT| WS_VISIBLE;
    else
        lStyle = DS_MODALFRAME | WS_CAPTION| WS_SYSMENU | WS_VISIBLE;

    lExtendedStyle = WS_EX_TOOLWINDOW|WS_EX_STATICEDGE;
    *p++ = LOWORD(lStyle);
    *p++ = HIWORD(lStyle);
    *p++ = LOWORD(lExtendedStyle);
    *p++ = HIWORD(lExtendedStyle);
    pnumitems = p;      /* save where the number of items must be stored */
    *p++ = 0;           // NumberOfItems(will change later)
    gui_mch_getmouse(&x, &y);
    if (initX == 0xffffL)
        *p++ = PixelToDialogX(x); // x
    else
        *p++ = PixelToDialogX(initX); // x
    if (initY == 0xffffL)
        *p++ = PixelToDialogY(y); // y
    else
        *p++ = PixelToDialogY(initY); // y
    *p++ = PixelToDialogX(dlgwidth);    // cx
    ptrueheight = p;
    *p++ = 0;           // dialog height: changed later anyway
    *p++ = 0;           // Menu
    *p++ = 0;           // Class

    /* copy the title of the dialog */
    nchar = nCopyAnsiToWideChar(p, ((*title)
                                    ? (LPSTR)title
                                    : (LPSTR)("Vim "VIM_VERSION_MEDIUM)));
    p += nchar;

    if (s_usenewlook)
    {
        /* do the font, since DS_3DLOOK doesn't work properly */
#ifdef USE_SYSMENU_FONT
        if (use_lfSysmenu)
        {
            /* point size */
            *p++ = -MulDiv(lfSysmenu.lfHeight, 72,
                    GetDeviceCaps(hdc, LOGPIXELSY));
            nchar = nCopyAnsiToWideChar(p, TEXT(lfSysmenu.lfFaceName));
        }
        else
#endif
        {
            *p++ = DLG_FONT_POINT_SIZE;         // point size
            nchar = nCopyAnsiToWideChar (p, TEXT(DLG_FONT_NAME));
        }
        p += nchar;
    }

    /*
     * Loop over all the items in the menu.
     * But skip over the tearbar.
     */
    if (STRCMP(menu->children->name, TEAR_STRING) == 0)
        menu = menu->children->next;
    else
        menu = menu->children;
    for ( ; menu != NULL; menu = menu->next)
    {
        if (menu->modes == 0)   /* this menu has just been deleted */
            continue;
        if (menu_is_separator(menu->dname))
        {
            sepPadding += 3;
            continue;
        }

        /* Check if there still is plenty of room in the template.  Make it
         * larger when needed. */
        if (((char *)p - (char *)pdlgtemplate) + 1000 > template_len)
        {
            WORD    *newp;

            newp = (WORD *)LocalAlloc(LPTR, template_len + 4096);
            if (newp != NULL)
            {
                template_len += 4096;
                mch_memmove(newp, pdlgtemplate,
                                            (char *)p - (char *)pdlgtemplate);
                p = newp + (p - pdlgtemplate);
                pnumitems = newp + (pnumitems - pdlgtemplate);
                ptrueheight = newp + (ptrueheight - pdlgtemplate);
                LocalFree(LocalHandle(pdlgtemplate));
                pdlgtemplate = newp;
            }
        }

        /* Figure out minimal length of this menu label.  Use "name" for the
         * actual text, "dname" for estimating the displayed size.  "name"
         * has "&a" for mnemonic and includes the accelerator. */
        len = nameLen = (int)STRLEN(menu->name);
        padding0 = (columnWidths[0] - GetTextWidthEnc(hdc, menu->dname,
                                      (int)STRLEN(menu->dname))) / spaceWidth;
        len += padding0;

        if (menu->actext != NULL)
        {
            acLen = (int)STRLEN(menu->actext);
            len += acLen;
            textWidth = GetTextWidthEnc(hdc, menu->actext, acLen);
        }
        else
            textWidth = 0;
        padding1 = (columnWidths[1] - textWidth) / spaceWidth;
        len += padding1;

        if (menu->children == NULL)
        {
            padding2 = submenuWidth / spaceWidth;
            len += padding2;
            menuID = (WORD)(menu->id);
        }
        else
        {
            len += (int)STRLEN(TEAROFF_SUBMENU_LABEL);
            menuID = (WORD)((long_u)(menu->submenu_id) | (DWORD)0x8000);
        }

        /* Allocate menu label and fill it in */
        text = label = alloc((unsigned)len + 1);
        if (label == NULL)
            break;

        vim_strncpy(text, menu->name, nameLen);
        text = vim_strchr(text, TAB);       /* stop at TAB before actext */
        if (text == NULL)
            text = label + nameLen;         /* no actext, use whole name */
        while (padding0-- > 0)
            *text++ = ' ';
        if (menu->actext != NULL)
        {
            STRNCPY(text, menu->actext, acLen);
            text += acLen;
        }
        while (padding1-- > 0)
            *text++ = ' ';
        if (menu->children != NULL)
        {
            STRCPY(text, TEAROFF_SUBMENU_LABEL);
            text += STRLEN(TEAROFF_SUBMENU_LABEL);
        }
        else
        {
            while (padding2-- > 0)
                *text++ = ' ';
        }
        *text = NUL;

        /*
         * BS_LEFT will just be ignored on Win32s/NT3.5x - on
         * W95/NT4 it makes the tear-off look more like a menu.
         */
        p = add_dialog_element(p,
                BS_PUSHBUTTON|BS_LEFT,
                (WORD)PixelToDialogX(TEAROFF_PADDING_X),
                (WORD)(sepPadding + 1 + 13 * (*pnumitems)),
                (WORD)PixelToDialogX(dlgwidth - 2 * TEAROFF_PADDING_X),
                (WORD)12,
                menuID, (WORD)0x0080, label);
        vim_free(label);
        (*pnumitems)++;
    }

    *ptrueheight = (WORD)(sepPadding + 1 + 13 * (*pnumitems));


    /* show modelessly */
    the_menu->tearoff_handle = CreateDialogIndirect(
            s_hinst,
            (LPDLGTEMPLATE)pdlgtemplate,
            s_hwnd,
            (DLGPROC)tearoff_callback);

    LocalFree(LocalHandle(pdlgtemplate));
    SelectFont(hdc, oldFont);
    DeleteObject(font);
    ReleaseDC(hwnd, hdc);

    /*
     * Reassert ourselves as the active window.  This is so that after creating
     * a tearoff, the user doesn't have to click with the mouse just to start
     * typing again!
     */
    (void)SetActiveWindow(s_hwnd);

    /* make sure the right buttons are enabled */
    force_menu_update = TRUE;
}
#endif

#if defined(FEAT_TOOLBAR) || defined(PROTO)
#include "gui_w32_rc.h"

/* This not defined in older SDKs */
# ifndef TBSTYLE_FLAT
#  define TBSTYLE_FLAT          0x0800
# endif

/*
 * Create the toolbar, initially unpopulated.
 *  (just like the menu, there are no defaults, it's all
 *  set up through menu.vim)
 */
    static void
initialise_toolbar(void)
{
    InitCommonControls();
    s_toolbarhwnd = CreateToolbarEx(
                    s_hwnd,
                    WS_CHILD | TBSTYLE_TOOLTIPS | TBSTYLE_FLAT,
                    4000,               //any old big number
                    31,                 //number of images in initial bitmap
                    s_hinst,
                    IDR_TOOLBAR1,       // id of initial bitmap
                    NULL,
                    0,                  // initial number of buttons
                    TOOLBAR_BUTTON_WIDTH, //api guide is wrong!
                    TOOLBAR_BUTTON_HEIGHT,
                    TOOLBAR_BUTTON_WIDTH,
                    TOOLBAR_BUTTON_HEIGHT,
                    sizeof(TBBUTTON)
                    );

    gui_mch_show_toolbar(vim_strchr(p_go, GO_TOOLBAR) != NULL);
}

    static int
get_toolbar_bitmap(vimmenu_T *menu)
{
    int i = -1;

    /*
     * Check user bitmaps first, unless builtin is specified.
     */
    if (!is_winnt_3() && !menu->icon_builtin)
    {
        char_u fname[MAXPATHL];
        HANDLE hbitmap = NULL;

        if (menu->iconfile != NULL)
        {
            gui_find_iconfile(menu->iconfile, fname, "bmp");
            hbitmap = LoadImage(
                        NULL,
                        fname,
                        IMAGE_BITMAP,
                        TOOLBAR_BUTTON_WIDTH,
                        TOOLBAR_BUTTON_HEIGHT,
                        LR_LOADFROMFILE |
                        LR_LOADMAP3DCOLORS
                        );
        }

        /*
         * If the LoadImage call failed, or the "icon=" file
         * didn't exist or wasn't specified, try the menu name
         */
        if (hbitmap == NULL
                && (gui_find_bitmap(menu->name, fname, "bmp") == OK))
            hbitmap = LoadImage(
                    NULL,
                    fname,
                    IMAGE_BITMAP,
                    TOOLBAR_BUTTON_WIDTH,
                    TOOLBAR_BUTTON_HEIGHT,
                    LR_LOADFROMFILE |
                    LR_LOADMAP3DCOLORS
                );

        if (hbitmap != NULL)
        {
            TBADDBITMAP tbAddBitmap;

            tbAddBitmap.hInst = NULL;
            tbAddBitmap.nID = (long_u)hbitmap;

            i = (int)SendMessage(s_toolbarhwnd, TB_ADDBITMAP,
                            (WPARAM)1, (LPARAM)&tbAddBitmap);
            /* i will be set to -1 if it fails */
        }
    }
    if (i == -1 && menu->iconidx >= 0 && menu->iconidx < TOOLBAR_BITMAP_COUNT)
        i = menu->iconidx;

    return i;
}
#endif

#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
    static void
initialise_tabline(void)
{
    InitCommonControls();

    s_tabhwnd = CreateWindow(WC_TABCONTROL, "Vim tabline",
            WS_CHILD|TCS_FOCUSNEVER|TCS_TOOLTIPS,
            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
            CW_USEDEFAULT, s_hwnd, NULL, s_hinst, NULL);

    gui.tabline_height = TABLINE_HEIGHT;

# ifdef USE_SYSMENU_FONT
    set_tabline_font();
# endif
}
#endif

#if defined(FEAT_OLE) || defined(FEAT_EVAL) || defined(PROTO)
/*
 * Make the GUI window come to the foreground.
 */
    void
gui_mch_set_foreground(void)
{
    if (IsIconic(s_hwnd))
         SendMessage(s_hwnd, WM_SYSCOMMAND, SC_RESTORE, 0);
    SetForegroundWindow(s_hwnd);
}
#endif

#if defined(FEAT_MBYTE_IME) && defined(DYNAMIC_IME)
    static void
dyn_imm_load(void)
{
    hLibImm = LoadLibrary("imm32.dll");
    if (hLibImm == NULL)
        return;

    pImmGetCompositionStringA
            = (void *)GetProcAddress(hLibImm, "ImmGetCompositionStringA");
    pImmGetCompositionStringW
            = (void *)GetProcAddress(hLibImm, "ImmGetCompositionStringW");
    pImmGetContext
            = (void *)GetProcAddress(hLibImm, "ImmGetContext");
    pImmAssociateContext
            = (void *)GetProcAddress(hLibImm, "ImmAssociateContext");
    pImmReleaseContext
            = (void *)GetProcAddress(hLibImm, "ImmReleaseContext");
    pImmGetOpenStatus
            = (void *)GetProcAddress(hLibImm, "ImmGetOpenStatus");
    pImmSetOpenStatus
            = (void *)GetProcAddress(hLibImm, "ImmSetOpenStatus");
    pImmGetCompositionFont
            = (void *)GetProcAddress(hLibImm, "ImmGetCompositionFontA");
    pImmSetCompositionFont
            = (void *)GetProcAddress(hLibImm, "ImmSetCompositionFontA");
    pImmSetCompositionWindow
            = (void *)GetProcAddress(hLibImm, "ImmSetCompositionWindow");
    pImmGetConversionStatus
            = (void *)GetProcAddress(hLibImm, "ImmGetConversionStatus");
    pImmSetConversionStatus
            = (void *)GetProcAddress(hLibImm, "ImmSetConversionStatus");

    if (       pImmGetCompositionStringA == NULL
            || pImmGetCompositionStringW == NULL
            || pImmGetContext == NULL
            || pImmAssociateContext == NULL
            || pImmReleaseContext == NULL
            || pImmGetOpenStatus == NULL
            || pImmSetOpenStatus == NULL
            || pImmGetCompositionFont == NULL
            || pImmSetCompositionFont == NULL
            || pImmSetCompositionWindow == NULL
            || pImmGetConversionStatus == NULL
            || pImmSetConversionStatus == NULL)
    {
        FreeLibrary(hLibImm);
        hLibImm = NULL;
        pImmGetContext = NULL;
        return;
    }

    return;
}

# if 0  /* not used */
    int
dyn_imm_unload(void)
{
    if (!hLibImm)
        return FALSE;
    FreeLibrary(hLibImm);
    hLibImm = NULL;
    return TRUE;
}
# endif

#endif

#if defined(FEAT_SIGN_ICONS) || defined(PROTO)

# ifdef FEAT_XPM_W32
#  define IMAGE_XPM   100
# endif

typedef struct _signicon_t
{
    HANDLE      hImage;
    UINT        uType;
#ifdef FEAT_XPM_W32
    HANDLE      hShape; /* Mask bitmap handle */
#endif
} signicon_t;

    void
gui_mch_drawsign(row, col, typenr)
    int         row;
    int         col;
    int         typenr;
{
    signicon_t *sign;
    int x, y, w, h;

    if (!gui.in_use || (sign = (signicon_t *)sign_get_image(typenr)) == NULL)
        return;

    x = TEXT_X(col);
    y = TEXT_Y(row);
    w = gui.char_width * 2;
    h = gui.char_height;
    switch (sign->uType)
    {
        case IMAGE_BITMAP:
            {
                HDC hdcMem;
                HBITMAP hbmpOld;

                hdcMem = CreateCompatibleDC(s_hdc);
                hbmpOld = (HBITMAP)SelectObject(hdcMem, sign->hImage);
                BitBlt(s_hdc, x, y, w, h, hdcMem, 0, 0, SRCCOPY);
                SelectObject(hdcMem, hbmpOld);
                DeleteDC(hdcMem);
            }
            break;
        case IMAGE_ICON:
        case IMAGE_CURSOR:
            DrawIconEx(s_hdc, x, y, (HICON)sign->hImage, w, h, 0, NULL, DI_NORMAL);
            break;
#ifdef FEAT_XPM_W32
        case IMAGE_XPM:
            {
                HDC hdcMem;
                HBITMAP hbmpOld;

                hdcMem = CreateCompatibleDC(s_hdc);
                hbmpOld = (HBITMAP)SelectObject(hdcMem, sign->hShape);
                /* Make hole */
                BitBlt(s_hdc, x, y, w, h, hdcMem, 0, 0, SRCAND);

                SelectObject(hdcMem, sign->hImage);
                /* Paint sign */
                BitBlt(s_hdc, x, y, w, h, hdcMem, 0, 0, SRCPAINT);
                SelectObject(hdcMem, hbmpOld);
                DeleteDC(hdcMem);
            }
            break;
#endif
    }
}

    static void
close_signicon_image(signicon_t *sign)
{
    if (sign)
        switch (sign->uType)
        {
            case IMAGE_BITMAP:
                DeleteObject((HGDIOBJ)sign->hImage);
                break;
            case IMAGE_CURSOR:
                DestroyCursor((HCURSOR)sign->hImage);
                break;
            case IMAGE_ICON:
                DestroyIcon((HICON)sign->hImage);
                break;
#ifdef FEAT_XPM_W32
            case IMAGE_XPM:
                DeleteObject((HBITMAP)sign->hImage);
                DeleteObject((HBITMAP)sign->hShape);
                break;
#endif
        }
}

    void *
gui_mch_register_sign(signfile)
    char_u      *signfile;
{
    signicon_t  sign, *psign;
    char_u      *ext;

    if (is_winnt_3())
    {
        EMSG(_(e_signdata));
        return NULL;
    }

    sign.hImage = NULL;
    ext = signfile + STRLEN(signfile) - 4; /* get extention */
    if (ext > signfile)
    {
        int do_load = 1;

        if (!STRICMP(ext, ".bmp"))
            sign.uType =  IMAGE_BITMAP;
        else if (!STRICMP(ext, ".ico"))
            sign.uType =  IMAGE_ICON;
        else if (!STRICMP(ext, ".cur") || !STRICMP(ext, ".ani"))
            sign.uType =  IMAGE_CURSOR;
        else
            do_load = 0;

        if (do_load)
            sign.hImage = (HANDLE)LoadImage(NULL, signfile, sign.uType,
                    gui.char_width * 2, gui.char_height,
                    LR_LOADFROMFILE | LR_CREATEDIBSECTION);
#ifdef FEAT_XPM_W32
        if (!STRICMP(ext, ".xpm"))
        {
            sign.uType = IMAGE_XPM;
            LoadXpmImage(signfile, (HBITMAP *)&sign.hImage, (HBITMAP *)&sign.hShape);
        }
#endif
    }

    psign = NULL;
    if (sign.hImage && (psign = (signicon_t *)alloc(sizeof(signicon_t)))
                                                                      != NULL)
        *psign = sign;

    if (!psign)
    {
        if (sign.hImage)
            close_signicon_image(&sign);
        EMSG(_(e_signdata));
    }
    return (void *)psign;

}

    void
gui_mch_destroy_sign(sign)
    void *sign;
{
    if (sign)
    {
        close_signicon_image((signicon_t *)sign);
        vim_free(sign);
    }
}
#endif

#if defined(FEAT_BEVAL) || defined(PROTO)

/* BALLOON-EVAL IMPLEMENTATION FOR WINDOWS.
 *  Added by Sergey Khorev <sergey.khorev@gmail.com>
 *
 * The only reused thing is gui_beval.h and get_beval_info()
 * from gui_beval.c (note it uses x and y of the BalloonEval struct
 * to get current mouse position).
 *
 * Trying to use as more Windows services as possible, and as less
 * IE version as possible :)).
 *
 * 1) Don't create ToolTip in gui_mch_create_beval_area, only initialize
 * BalloonEval struct.
 * 2) Enable/Disable simply create/kill BalloonEval Timer
 * 3) When there was enough inactivity, timer procedure posts
 * async request to debugger
 * 4) gui_mch_post_balloon (invoked from netbeans.c) creates tooltip control
 * and performs some actions to show it ASAP
 * 5) WM_NOTIFY:TTN_POP destroys created tooltip
 */

/*
 * determine whether installed Common Controls support multiline tooltips
 * (i.e. their version is >= 4.70
 */
    int
multiline_balloon_available(void)
{
    HINSTANCE hDll;
    static char comctl_dll[] = "comctl32.dll";
    static int multiline_tip = MAYBE;

    if (multiline_tip != MAYBE)
        return multiline_tip;

    hDll = GetModuleHandle(comctl_dll);
    if (hDll != NULL)
    {
        DLLGETVERSIONPROC pGetVer;
        pGetVer = (DLLGETVERSIONPROC)GetProcAddress(hDll, "DllGetVersion");

        if (pGetVer != NULL)
        {
            DLLVERSIONINFO dvi;
            HRESULT hr;

            ZeroMemory(&dvi, sizeof(dvi));
            dvi.cbSize = sizeof(dvi);

            hr = (*pGetVer)(&dvi);

            if (SUCCEEDED(hr)
                    && (dvi.dwMajorVersion > 4
                        || (dvi.dwMajorVersion == 4
                                                && dvi.dwMinorVersion >= 70)))
            {
                multiline_tip = TRUE;
                return multiline_tip;
            }
        }
        else
        {
            /* there is chance we have ancient CommCtl 4.70
               which doesn't export DllGetVersion */
            DWORD dwHandle = 0;
            DWORD len = GetFileVersionInfoSize(comctl_dll, &dwHandle);
            if (len > 0)
            {
                VS_FIXEDFILEINFO *ver;
                UINT vlen = 0;
                void *data = alloc(len);

                if (data != NULL
                        && GetFileVersionInfo(comctl_dll, 0, len, data)
                        && VerQueryValue(data, "\\", (void **)&ver, &vlen)
                        && vlen
                        && HIWORD(ver->dwFileVersionMS) > 4
                        || (HIWORD(ver->dwFileVersionMS) == 4
                            && LOWORD(ver->dwFileVersionMS) >= 70))
                {
                    vim_free(data);
                    multiline_tip = TRUE;
                    return multiline_tip;
                }
                vim_free(data);
            }
        }
    }
    multiline_tip = FALSE;
    return multiline_tip;
}

    static void
make_tooltip(beval, text, pt)
    BalloonEval *beval;
    char *text;
    POINT pt;
{
    TOOLINFO    *pti;
    int         ToolInfoSize;

    if (multiline_balloon_available() == TRUE)
        ToolInfoSize = sizeof(TOOLINFO_NEW);
    else
        ToolInfoSize = sizeof(TOOLINFO);

    pti = (TOOLINFO *)alloc(ToolInfoSize);
    if (pti == NULL)
        return;

    beval->balloon = CreateWindowEx(WS_EX_TOPMOST, TOOLTIPS_CLASS,
            NULL, WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,
            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
            beval->target, NULL, s_hinst, NULL);

    SetWindowPos(beval->balloon, HWND_TOPMOST, 0, 0, 0, 0,
            SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

    pti->cbSize = ToolInfoSize;
    pti->uFlags = TTF_SUBCLASS;
    pti->hwnd = beval->target;
    pti->hinst = 0; /* Don't use string resources */
    pti->uId = ID_BEVAL_TOOLTIP;

    if (multiline_balloon_available() == TRUE)
    {
        RECT rect;
        TOOLINFO_NEW *ptin = (TOOLINFO_NEW *)pti;
        pti->lpszText = LPSTR_TEXTCALLBACK;
        ptin->lParam = (LPARAM)text;
        if (GetClientRect(s_textArea, &rect)) /* switch multiline tooltips on */
            SendMessage(beval->balloon, TTM_SETMAXTIPWIDTH, 0,
                    (LPARAM)rect.right);
    }
    else
        pti->lpszText = text; /* do this old way */

    /* Limit ballooneval bounding rect to CursorPos neighbourhood */
    pti->rect.left = pt.x - 3;
    pti->rect.top = pt.y - 3;
    pti->rect.right = pt.x + 3;
    pti->rect.bottom = pt.y + 3;

    SendMessage(beval->balloon, TTM_ADDTOOL, 0, (LPARAM)pti);
    /* Make tooltip appear sooner */
    SendMessage(beval->balloon, TTM_SETDELAYTIME, TTDT_INITIAL, 10);
    /* I've performed some tests and it seems the longest possible life time
     * of tooltip is 30 seconds */
    SendMessage(beval->balloon, TTM_SETDELAYTIME, TTDT_AUTOPOP, 30000);
    /*
     * HACK: force tooltip to appear, because it'll not appear until
     * first mouse move. D*mn M$
     * Amazingly moving (2, 2) and then (-1, -1) the mouse doesn't move.
     */
    mouse_event(MOUSEEVENTF_MOVE, 2, 2, 0, 0);
    mouse_event(MOUSEEVENTF_MOVE, (DWORD)-1, (DWORD)-1, 0, 0);
    vim_free(pti);
}

    static void
delete_tooltip(beval)
    BalloonEval *beval;
{
    DestroyWindow(beval->balloon);
}

/*ARGSUSED*/
    static VOID CALLBACK
BevalTimerProc(hwnd, uMsg, idEvent, dwTime)
    HWND    hwnd;
    UINT    uMsg;
    UINT_PTR    idEvent;
    DWORD   dwTime;
{
    POINT       pt;
    RECT        rect;

    if (cur_beval == NULL || cur_beval->showState == ShS_SHOWING || !p_beval)
        return;

    GetCursorPos(&pt);
    if (WindowFromPoint(pt) != s_textArea)
        return;

    ScreenToClient(s_textArea, &pt);
    GetClientRect(s_textArea, &rect);
    if (!PtInRect(&rect, pt))
        return;

    if (LastActivity > 0
            && (dwTime - LastActivity) >= (DWORD)p_bdlay
            && (cur_beval->showState != ShS_PENDING
                || abs(cur_beval->x - pt.x) > 3
                || abs(cur_beval->y - pt.y) > 3))
    {
        /* Pointer resting in one place long enough, it's time to show
         * the tooltip. */
        cur_beval->showState = ShS_PENDING;
        cur_beval->x = pt.x;
        cur_beval->y = pt.y;

        // TRACE0("BevalTimerProc: sending request");

        if (cur_beval->msgCB != NULL)
            (*cur_beval->msgCB)(cur_beval, 0);
    }
}

/*ARGSUSED*/
    void
gui_mch_disable_beval_area(beval)
    BalloonEval *beval;
{
    // TRACE0("gui_mch_disable_beval_area {{{");
    KillTimer(s_textArea, BevalTimerId);
    // TRACE0("gui_mch_disable_beval_area }}}");
}

/*ARGSUSED*/
    void
gui_mch_enable_beval_area(beval)
    BalloonEval *beval;
{
    // TRACE0("gui_mch_enable_beval_area |||");
    if (beval == NULL)
        return;
    // TRACE0("gui_mch_enable_beval_area {{{");
    BevalTimerId = SetTimer(s_textArea, 0, p_bdlay / 2, BevalTimerProc);
    // TRACE0("gui_mch_enable_beval_area }}}");
}

    void
gui_mch_post_balloon(beval, mesg)
    BalloonEval *beval;
    char_u      *mesg;
{
    POINT   pt;
    // TRACE0("gui_mch_post_balloon {{{");
    if (beval->showState == ShS_SHOWING)
        return;
    GetCursorPos(&pt);
    ScreenToClient(s_textArea, &pt);

    if (abs(beval->x - pt.x) < 3 && abs(beval->y - pt.y) < 3)
        /* cursor is still here */
    {
        gui_mch_disable_beval_area(cur_beval);
        beval->showState = ShS_SHOWING;
        make_tooltip(beval, mesg, pt);
    }
    // TRACE0("gui_mch_post_balloon }}}");
}

/*ARGSUSED*/
    BalloonEval *
gui_mch_create_beval_area(target, mesg, mesgCB, clientData)
    void        *target;        /* ignored, always use s_textArea */
    char_u      *mesg;
    void        (*mesgCB)__ARGS((BalloonEval *, int));
    void        *clientData;
{
    /* partially stolen from gui_beval.c */
    BalloonEval *beval;

    if (mesg != NULL && mesgCB != NULL)
    {
        EMSG(_("E232: Cannot create BalloonEval with both message and callback"));
        return NULL;
    }

    beval = (BalloonEval *)alloc(sizeof(BalloonEval));
    if (beval != NULL)
    {
        beval->target = s_textArea;
        beval->balloon = NULL;

        beval->showState = ShS_NEUTRAL;
        beval->x = 0;
        beval->y = 0;
        beval->msg = mesg;
        beval->msgCB = mesgCB;
        beval->clientData = clientData;

        InitCommonControls();
        cur_beval = beval;

        if (p_beval)
            gui_mch_enable_beval_area(beval);

    }
    return beval;
}

/*ARGSUSED*/
    static void
Handle_WM_Notify(hwnd, pnmh)
    HWND hwnd;
    LPNMHDR pnmh;
{
    if (pnmh->idFrom != ID_BEVAL_TOOLTIP) /* it is not our tooltip */
        return;

    if (cur_beval != NULL)
    {
        switch (pnmh->code)
        {
        case TTN_SHOW:
            // TRACE0("TTN_SHOW {{{");
            // TRACE0("TTN_SHOW }}}");
            break;
        case TTN_POP: /* Before tooltip disappear */
            // TRACE0("TTN_POP {{{");
            delete_tooltip(cur_beval);
            gui_mch_enable_beval_area(cur_beval);
            // TRACE0("TTN_POP }}}");

            cur_beval->showState = ShS_NEUTRAL;
            break;
        case TTN_GETDISPINFO:
            {
                /* if you get there then we have new common controls */
                NMTTDISPINFO_NEW *info = (NMTTDISPINFO_NEW *)pnmh;
                info->lpszText = (LPSTR)info->lParam;
                info->uFlags |= TTF_DI_SETITEM;
            }
            break;
        }
    }
}

    static void
TrackUserActivity(UINT uMsg)
{
    if ((uMsg >= WM_MOUSEFIRST && uMsg <= WM_MOUSELAST)
            || (uMsg >= WM_KEYFIRST && uMsg <= WM_KEYLAST))
        LastActivity = GetTickCount();
}

    void
gui_mch_destroy_beval_area(beval)
    BalloonEval *beval;
{
    vim_free(beval);
}
#endif /* FEAT_BEVAL */

#if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
/*
 * We have multiple signs to draw at the same location. Draw the
 * multi-sign indicator (down-arrow) instead. This is the Win32 version.
 */
    void
netbeans_draw_multisign_indicator(int row)
{
    int i;
    int y;
    int x;

    x = 0;
    y = TEXT_Y(row);

    for (i = 0; i < gui.char_height - 3; i++)
        SetPixel(s_hdc, x+2, y++, gui.currFgColor);

    SetPixel(s_hdc, x+0, y, gui.currFgColor);
    SetPixel(s_hdc, x+2, y, gui.currFgColor);
    SetPixel(s_hdc, x+4, y++, gui.currFgColor);
    SetPixel(s_hdc, x+1, y, gui.currFgColor);
    SetPixel(s_hdc, x+2, y, gui.currFgColor);
    SetPixel(s_hdc, x+3, y++, gui.currFgColor);
    SetPixel(s_hdc, x+2, y, gui.currFgColor);
}
#endif