dlls/user32/msgbox.c

   1 /*
   2  * Message boxes
   3  *
   4  * Copyright 1995 Bernd Schmidt
   5  * Copyright 2004 Ivan Leo Puoti, Juan Lang
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winternl.h"
  29 #include "dlgs.h"
  30 #include "user_private.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(dialog);
  34 WINE_DECLARE_DEBUG_CHANNEL(msgbox);
  35
  36 #define MSGBOX_IDICON stc1
  37 #define MSGBOX_IDTEXT 100
  38 #define IDS_ERROR     2
  39
  40 struct ThreadWindows
  41 {
  42     UINT numHandles;
  43     UINT numAllocs;
  44     HWND *handles;
  45 };
  46
  47 static BOOL CALLBACK MSGBOX_EnumProc(HWND hwnd, LPARAM lParam)
  48 {
  49     struct ThreadWindows *threadWindows = (struct ThreadWindows *)lParam;
  50
  51     if (!EnableWindow(hwnd, FALSE))
  52     {
  53         if(threadWindows->numHandles >= threadWindows->numAllocs)
  54         {
  55             threadWindows->handles = HeapReAlloc(GetProcessHeap(), 0, threadWindows->handles,
  56                                                  (threadWindows->numAllocs*2)*sizeof(HWND));
  57             threadWindows->numAllocs *= 2;
  58         }
  59         threadWindows->handles[threadWindows->numHandles++]=hwnd;
  60     }
  61    return TRUE;
  62 }
  63
  64 static HFONT MSGBOX_OnInit(HWND hwnd, LPMSGBOXPARAMSW lpmb)
  65 {
  66     HFONT hFont = 0, hPrevFont = 0;
  67     RECT rect;
  68     HWND hItem;
  69     HDC hdc;
  70     int i, buttons;
  71     int bspace, bw, bh, theight, tleft, wwidth, wheight, wleft, wtop, bpos;
  72     int borheight, borwidth, iheight, ileft, iwidth, twidth, tiheight;
  73     NONCLIENTMETRICSW nclm;
  74     HMONITOR monitor = 0;
  75     MONITORINFO mon_info;
  76     LPCWSTR lpszText;
  77     WCHAR *buffer = NULL;
  78     const WCHAR *ptr;
  79
  80     /* Index the order the buttons need to appear to an ID* constant */
  81     static const int buttonOrder[10] = { IDYES, IDNO, IDOK, IDABORT, IDRETRY,
  82                                          IDCANCEL, IDIGNORE, IDTRYAGAIN,
  83                                          IDCONTINUE, IDHELP };
  84
  85     nclm.cbSize = sizeof(nclm);
  86     SystemParametersInfoW (SPI_GETNONCLIENTMETRICS, 0, &nclm, 0);
  87     hFont = CreateFontIndirectW (&nclm.lfMessageFont);
  88     /* set button font */
  89     for (i = IDOK; i <= IDCONTINUE; i++)
  90         /* no close button */
  91         if (i != IDCLOSE)
  92             SendDlgItemMessageW (hwnd, i, WM_SETFONT, (WPARAM)hFont, 0);
  93
  94     /* set text font */
  95     SendDlgItemMessageW (hwnd, MSGBOX_IDTEXT, WM_SETFONT, (WPARAM)hFont, 0);
  96
  97     if (!IS_INTRESOURCE(lpmb->lpszCaption)) {
  98        SetWindowTextW(hwnd, lpmb->lpszCaption);
  99     } else {
 100         UINT len = LoadStringW( lpmb->hInstance, LOWORD(lpmb->lpszCaption), (LPWSTR)&ptr, 0 );
 101         if (!len) len = LoadStringW( user32_module, IDS_ERROR, (LPWSTR)&ptr, 0 );
 102         buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 103         if (buffer)
 104         {
 105             memcpy( buffer, ptr, len * sizeof(WCHAR) );
 106             buffer[len] = 0;
 107             SetWindowTextW( hwnd, buffer );
 108             HeapFree( GetProcessHeap(), 0, buffer );
 109             buffer = NULL;
 110         }
 111     }
 112     if (IS_INTRESOURCE(lpmb->lpszText)) {
 113         UINT len = LoadStringW( lpmb->hInstance, LOWORD(lpmb->lpszText), (LPWSTR)&ptr, 0 );
 114         lpszText = buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 115         if (buffer)
 116         {
 117             memcpy( buffer, ptr, len * sizeof(WCHAR) );
 118             buffer[len] = 0;
 119         }
 120     } else {
 121        lpszText = lpmb->lpszText;
 122     }
 123
 124     TRACE_(msgbox)("%s\n", debugstr_w(lpszText));
 125     SetWindowTextW(GetDlgItem(hwnd, MSGBOX_IDTEXT), lpszText);
 126
 127     /* Remove not selected buttons */
 128     switch(lpmb->dwStyle & MB_TYPEMASK) {
 129     case MB_OK:
 130         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 131         /* fall through */
 132     case MB_OKCANCEL:
 133         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 134         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 135         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 136         DestroyWindow(GetDlgItem(hwnd, IDYES));
 137         DestroyWindow(GetDlgItem(hwnd, IDNO));
 138         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 139         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 140         break;
 141     case MB_ABORTRETRYIGNORE:
 142         DestroyWindow(GetDlgItem(hwnd, IDOK));
 143         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 144         DestroyWindow(GetDlgItem(hwnd, IDYES));
 145         DestroyWindow(GetDlgItem(hwnd, IDNO));
 146         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 147         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 148         break;
 149     case MB_YESNO:
 150         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 151         /* fall through */
 152     case MB_YESNOCANCEL:
 153         DestroyWindow(GetDlgItem(hwnd, IDOK));
 154         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 155         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 156         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 157         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 158         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 159         break;
 160     case MB_RETRYCANCEL:
 161         DestroyWindow(GetDlgItem(hwnd, IDOK));
 162         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 163         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 164         DestroyWindow(GetDlgItem(hwnd, IDYES));
 165         DestroyWindow(GetDlgItem(hwnd, IDNO));
 166         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 167         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 168         break;
 169     case MB_CANCELTRYCONTINUE:
 170         DestroyWindow(GetDlgItem(hwnd, IDOK));
 171         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 172         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 173         DestroyWindow(GetDlgItem(hwnd, IDYES));
 174         DestroyWindow(GetDlgItem(hwnd, IDNO));
 175         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 176     }
 177     /* Set the icon */
 178     switch(lpmb->dwStyle & MB_ICONMASK) {
 179     case MB_ICONEXCLAMATION:
 180         SendDlgItemMessageW(hwnd, MSGBOX_IDICON, STM_SETICON,
 181                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_EXCLAMATION), 0);
 182         break;
 183     case MB_ICONQUESTION:
 184         SendDlgItemMessageW(hwnd, MSGBOX_IDICON, STM_SETICON,
 185                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_QUESTION), 0);
 186         break;
 187     case MB_ICONASTERISK:
 188         SendDlgItemMessageW(hwnd, MSGBOX_IDICON, STM_SETICON,
 189                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_ASTERISK), 0);
 190         break;
 191     case MB_ICONHAND:
 192       SendDlgItemMessageW(hwnd, MSGBOX_IDICON, STM_SETICON,
 193                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_HAND), 0);
 194       break;
 195     case MB_USERICON:
 196       SendDlgItemMessageW(hwnd, MSGBOX_IDICON, STM_SETICON,
 197                           (WPARAM)LoadIconW(lpmb->hInstance, lpmb->lpszIcon), 0);
 198       break;
 199     default:
 200         /* By default, Windows 95/98/NT do not associate an icon to message boxes.
 201          * So wine should do the same.
 202          */
 203         break;
 204     }
 205
 206     /* Remove Help button unless MB_HELP supplied */
 207     if (!(lpmb->dwStyle & MB_HELP)) {
 208         DestroyWindow(GetDlgItem(hwnd, IDHELP));
 209     }
 210
 211     /* Position everything */
 212     GetWindowRect(hwnd, &rect);
 213     borheight = rect.bottom - rect.top;
 214     borwidth  = rect.right - rect.left;
 215     GetClientRect(hwnd, &rect);
 216     borheight -= rect.bottom - rect.top;
 217     borwidth  -= rect.right - rect.left;
 218
 219     /* Get the icon height */
 220     GetWindowRect(GetDlgItem(hwnd, MSGBOX_IDICON), &rect);
 221     MapWindowPoints(0, hwnd, (LPPOINT)&rect, 2);
 222     if (!(lpmb->dwStyle & MB_ICONMASK))
 223     {
 224         rect.bottom = rect.top;
 225         rect.right = rect.left;
 226     }
 227     iheight = rect.bottom - rect.top;
 228     ileft = rect.left;
 229     iwidth = rect.right - ileft;
 230
 231     hdc = GetDC(hwnd);
 232     if (hFont)
 233         hPrevFont = SelectObject(hdc, hFont);
 234
 235     /* Get the number of visible buttons and their size */
 236     bh = bw = 1; /* Minimum button sizes */
 237     for (buttons = 0, i = IDOK; i <= IDCONTINUE; i++)
 238     {
 239         if (i == IDCLOSE) continue; /* No CLOSE button */
 240         hItem = GetDlgItem(hwnd, i);
 241         if (GetWindowLongW(hItem, GWL_STYLE) & WS_VISIBLE)
 242         {
 243             WCHAR buttonText[1024];
 244             int w, h;
 245             buttons++;
 246             if (GetWindowTextW(hItem, buttonText, 1024))
 247             {
 248                 DrawTextW( hdc, buttonText, -1, &rect, DT_LEFT | DT_EXPANDTABS | DT_CALCRECT);
 249                 h = rect.bottom - rect.top;
 250                 w = rect.right - rect.left;
 251                 if (h > bh) bh = h;
 252                 if (w > bw)  bw = w ;
 253             }
 254         }
 255     }
 256     bw = max(bw, bh * 2);
 257     /* Button white space */
 258     bh = bh * 2;
 259     bw = bw * 2;
 260     bspace = bw/3; /* Space between buttons */
 261
 262     /* Get the text size */
 263     GetClientRect(GetDlgItem(hwnd, MSGBOX_IDTEXT), &rect);
 264     rect.top = rect.left = rect.bottom = 0;
 265     DrawTextW( hdc, lpszText, -1, &rect,
 266                DT_LEFT | DT_EXPANDTABS | DT_WORDBREAK | DT_CALCRECT);
 267     /* Min text width corresponds to space for the buttons */
 268     tleft = ileft;
 269     if (iwidth) tleft += ileft + iwidth;
 270     twidth = max((bw + bspace) * buttons + bspace - tleft, rect.right);
 271     theight = rect.bottom;
 272
 273     if (hFont)
 274         SelectObject(hdc, hPrevFont);
 275     ReleaseDC(hwnd, hdc);
 276
 277     tiheight = 16 + max(iheight, theight);
 278     wwidth  = tleft + twidth + ileft + borwidth;
 279     wheight = 8 + tiheight + bh + borheight;
 280
 281     /* Message boxes are always desktop centered, so query desktop size and center window */
 282     monitor = MonitorFromWindow(lpmb->hwndOwner ? lpmb->hwndOwner : GetActiveWindow(), MONITOR_DEFAULTTOPRIMARY);
 283     mon_info.cbSize = sizeof(mon_info);
 284     GetMonitorInfoW(monitor, &mon_info);
 285     wleft = (mon_info.rcWork.left + mon_info.rcWork.right - wwidth) / 2;
 286     wtop = (mon_info.rcWork.top + mon_info.rcWork.bottom - wheight) / 2;
 287
 288     /* Resize and center the window */
 289     SetWindowPos(hwnd, 0, wleft, wtop, wwidth, wheight,
 290                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 291
 292     /* Position the icon */
 293     SetWindowPos(GetDlgItem(hwnd, MSGBOX_IDICON), 0, ileft, (tiheight - iheight) / 2, 0, 0,
 294                  SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 295
 296     /* Position the text */
 297     SetWindowPos(GetDlgItem(hwnd, MSGBOX_IDTEXT), 0, tleft, (tiheight - theight) / 2, twidth, theight,
 298                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 299
 300     /* Position the buttons */
 301     bpos = (wwidth - (bw + bspace) * buttons + bspace) / 2;
 302     for (buttons = i = 0; i < (sizeof(buttonOrder) / sizeof(buttonOrder[0])); i++) {
 303
 304         /* Convert the button order to ID* value to order for the buttons */
 305         hItem = GetDlgItem(hwnd, buttonOrder[i]);
 306         if (GetWindowLongW(hItem, GWL_STYLE) & WS_VISIBLE) {
 307             if (buttons++ == ((lpmb->dwStyle & MB_DEFMASK) >> 8)) {
 308                 SetFocus(hItem);
 309                 SendMessageW( hItem, BM_SETSTYLE, BS_DEFPUSHBUTTON, TRUE );
 310             }
 311             SetWindowPos(hItem, 0, bpos, tiheight, bw, bh,
 312                          SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOREDRAW);
 313             bpos += bw + bspace;
 314         }
 315     }
 316
 317     /*handle modal message boxes*/
 318     if (((lpmb->dwStyle & MB_TASKMODAL) && (lpmb->hwndOwner==NULL)) || (lpmb->dwStyle & MB_SYSTEMMODAL))
 319         SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
 320
 321     HeapFree( GetProcessHeap(), 0, buffer );
 322     return hFont;
 323 }
 324
 325
 326 /**************************************************************************
 327  *           MSGBOX_DlgProc
 328  *
 329  * Dialog procedure for message boxes.
 330  */
 331 static INT_PTR CALLBACK MSGBOX_DlgProc( HWND hwnd, UINT message,
 332                                         WPARAM wParam, LPARAM lParam )
 333 {
 334   HFONT hFont;
 335
 336   switch(message) {
 337    case WM_INITDIALOG:
 338    {
 339        LPMSGBOXPARAMSW mbp = (LPMSGBOXPARAMSW)lParam;
 340        SetWindowContextHelpId(hwnd, mbp->dwContextHelpId);
 341        hFont = MSGBOX_OnInit(hwnd, mbp);
 342        SetPropA(hwnd, "WINE_MSGBOX_HFONT", hFont);
 343        SetPropA(hwnd, "WINE_MSGBOX_HELPCALLBACK", mbp->lpfnMsgBoxCallback);
 344        break;
 345    }
 346
 347    case WM_COMMAND:
 348     switch (LOWORD(wParam))
 349     {
 350      case IDOK:
 351      case IDCANCEL:
 352      case IDABORT:
 353      case IDRETRY:
 354      case IDIGNORE:
 355      case IDYES:
 356      case IDNO:
 357      case IDTRYAGAIN:
 358      case IDCONTINUE:
 359       hFont = GetPropA(hwnd, "WINE_MSGBOX_HFONT");
 360       EndDialog(hwnd, wParam);
 361       if (hFont)
 362           DeleteObject(hFont);
 363       break;
 364      case IDHELP:
 365       FIXME("Help button not supported yet\n");
 366       break;
 367     }
 368     break;
 369
 370     case WM_HELP:
 371     {
 372         MSGBOXCALLBACK callback = (MSGBOXCALLBACK)GetPropA(hwnd, "WINE_MSGBOX_HELPCALLBACK");
 373         HELPINFO hi;
 374
 375         memcpy(&hi, (void *)lParam, sizeof(hi));
 376         hi.dwContextId = GetWindowContextHelpId(hwnd);
 377
 378         if (callback)
 379             callback(&hi);
 380         else
 381             SendMessageW(GetWindow(hwnd, GW_OWNER), WM_HELP, 0, (LPARAM)&hi);
 382         break;
 383    }
 384
 385    default:
 386      /* Ok. Ignore all the other messages */
 387      TRACE("Message number 0x%04x is being ignored.\n", message);
 388     break;
 389   }
 390   return 0;
 391 }
 392
 393
 394 /**************************************************************************
 395  *              MessageBoxA (USER32.@)
 396  */
 397 INT WINAPI MessageBoxA(HWND hWnd, LPCSTR text, LPCSTR title, UINT type)
 398 {
 399     return MessageBoxExA(hWnd, text, title, type, LANG_NEUTRAL);
 400 }
 401
 402
 403 /**************************************************************************
 404  *              MessageBoxW (USER32.@)
 405  */
 406 INT WINAPI MessageBoxW( HWND hwnd, LPCWSTR text, LPCWSTR title, UINT type )
 407 {
 408     return MessageBoxExW(hwnd, text, title, type, LANG_NEUTRAL);
 409 }
 410
 411
 412 /**************************************************************************
 413  *              MessageBoxExA (USER32.@)
 414  */
 415 INT WINAPI MessageBoxExA( HWND hWnd, LPCSTR text, LPCSTR title,
 416                               UINT type, WORD langid )
 417 {
 418     MSGBOXPARAMSA msgbox;
 419
 420     msgbox.cbSize = sizeof(msgbox);
 421     msgbox.hwndOwner = hWnd;
 422     msgbox.hInstance = 0;
 423     msgbox.lpszText = text;
 424     msgbox.lpszCaption = title;
 425     msgbox.dwStyle = type;
 426     msgbox.lpszIcon = NULL;
 427     msgbox.dwContextHelpId = 0;
 428     msgbox.lpfnMsgBoxCallback = NULL;
 429     msgbox.dwLanguageId = langid;
 430
 431     return MessageBoxIndirectA(&msgbox);
 432 }
 433
 434 /**************************************************************************
 435  *              MessageBoxExW (USER32.@)
 436  */
 437 INT WINAPI MessageBoxExW( HWND hWnd, LPCWSTR text, LPCWSTR title,
 438                               UINT type, WORD langid )
 439 {
 440     MSGBOXPARAMSW msgbox;
 441
 442     msgbox.cbSize = sizeof(msgbox);
 443     msgbox.hwndOwner = hWnd;
 444     msgbox.hInstance = 0;
 445     msgbox.lpszText = text;
 446     msgbox.lpszCaption = title;
 447     msgbox.dwStyle = type;
 448     msgbox.lpszIcon = NULL;
 449     msgbox.dwContextHelpId = 0;
 450     msgbox.lpfnMsgBoxCallback = NULL;
 451     msgbox.dwLanguageId = langid;
 452
 453     return MessageBoxIndirectW(&msgbox);
 454 }
 455
 456 /**************************************************************************
 457  *      MessageBoxTimeoutA (USER32.@)
 458  */
 459 INT WINAPI MessageBoxTimeoutA( HWND hWnd, LPCSTR text, LPCSTR title,
 460                                UINT type, WORD langid, DWORD timeout )
 461 {
 462     FIXME("timeout not supported (%u)\n", timeout);
 463     return MessageBoxExA( hWnd, text, title, type, langid );
 464 }
 465
 466 /**************************************************************************
 467  *      MessageBoxTimeoutW (USER32.@)
 468  */
 469 INT WINAPI MessageBoxTimeoutW( HWND hWnd, LPCWSTR text, LPCWSTR title,
 470                                UINT type, WORD langid, DWORD timeout )
 471 {
 472     FIXME("timeout not supported (%u)\n", timeout);
 473     return MessageBoxExW( hWnd, text, title, type, langid );
 474 }
 475
 476 /**************************************************************************
 477  *              MessageBoxIndirectA (USER32.@)
 478  */
 479 INT WINAPI MessageBoxIndirectA( LPMSGBOXPARAMSA msgbox )
 480 {
 481     MSGBOXPARAMSW msgboxW;
 482     UNICODE_STRING textW, captionW, iconW;
 483     int ret;
 484
 485     if (IS_INTRESOURCE(msgbox->lpszText))
 486         textW.Buffer = (LPWSTR)msgbox->lpszText;
 487     else
 488         RtlCreateUnicodeStringFromAsciiz(&textW, msgbox->lpszText);
 489     if (IS_INTRESOURCE(msgbox->lpszCaption))
 490         captionW.Buffer = (LPWSTR)msgbox->lpszCaption;
 491     else
 492         RtlCreateUnicodeStringFromAsciiz(&captionW, msgbox->lpszCaption);
 493
 494     if (msgbox->dwStyle & MB_USERICON)
 495     {
 496         if (IS_INTRESOURCE(msgbox->lpszIcon))
 497             iconW.Buffer = (LPWSTR)msgbox->lpszIcon;
 498         else
 499             RtlCreateUnicodeStringFromAsciiz(&iconW, msgbox->lpszIcon);
 500     }
 501     else
 502         iconW.Buffer = NULL;
 503
 504     msgboxW.cbSize = sizeof(msgboxW);
 505     msgboxW.hwndOwner = msgbox->hwndOwner;
 506     msgboxW.hInstance = msgbox->hInstance;
 507     msgboxW.lpszText = textW.Buffer;
 508     msgboxW.lpszCaption = captionW.Buffer;
 509     msgboxW.dwStyle = msgbox->dwStyle;
 510     msgboxW.lpszIcon = iconW.Buffer;
 511     msgboxW.dwContextHelpId = msgbox->dwContextHelpId;
 512     msgboxW.lpfnMsgBoxCallback = msgbox->lpfnMsgBoxCallback;
 513     msgboxW.dwLanguageId = msgbox->dwLanguageId;
 514
 515     ret = MessageBoxIndirectW(&msgboxW);
 516
 517     if (!IS_INTRESOURCE(textW.Buffer)) RtlFreeUnicodeString(&textW);
 518     if (!IS_INTRESOURCE(captionW.Buffer)) RtlFreeUnicodeString(&captionW);
 519     if (!IS_INTRESOURCE(iconW.Buffer)) RtlFreeUnicodeString(&iconW);
 520     return ret;
 521 }
 522
 523 /**************************************************************************
 524  *              MessageBoxIndirectW (USER32.@)
 525  */
 526 INT WINAPI MessageBoxIndirectW( LPMSGBOXPARAMSW msgbox )
 527 {
 528     LPVOID tmplate;
 529     HRSRC hRes;
 530     int ret;
 531     UINT i;
 532     struct ThreadWindows threadWindows;
 533     static const WCHAR msg_box_res_nameW[] = { 'M','S','G','B','O','X',0 };
 534
 535     if (!(hRes = FindResourceExW(user32_module, (LPWSTR)RT_DIALOG,
 536                                  msg_box_res_nameW, msgbox->dwLanguageId)))
 537     {
 538         if (!msgbox->dwLanguageId ||
 539             !(hRes = FindResourceExW(user32_module, (LPWSTR)RT_DIALOG, msg_box_res_nameW, LANG_NEUTRAL)))
 540             return 0;
 541     }
 542     if (!(tmplate = LoadResource(user32_module, hRes)))
 543         return 0;
 544
 545     if ((msgbox->dwStyle & MB_TASKMODAL) && (msgbox->hwndOwner==NULL))
 546     {
 547         threadWindows.numHandles = 0;
 548         threadWindows.numAllocs = 10;
 549         threadWindows.handles = HeapAlloc(GetProcessHeap(), 0, 10*sizeof(HWND));
 550         EnumThreadWindows(GetCurrentThreadId(), MSGBOX_EnumProc, (LPARAM)&threadWindows);
 551     }
 552
 553     ret=DialogBoxIndirectParamW(msgbox->hInstance, tmplate,
 554                                 msgbox->hwndOwner, MSGBOX_DlgProc, (LPARAM)msgbox);
 555
 556     if ((msgbox->dwStyle & MB_TASKMODAL) && (msgbox->hwndOwner==NULL))
 557     {
 558         for (i = 0; i < threadWindows.numHandles; i++)
 559             EnableWindow(threadWindows.handles[i], TRUE);
 560         HeapFree(GetProcessHeap(), 0, threadWindows.handles);
 561     }
 562     return ret;
 563 }