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 1088
  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] = { 6, 7, 1, 3, 4, 2, 5, 10, 11, 9 };
  82
  83     nclm.cbSize = sizeof(nclm);
  84     SystemParametersInfoW (SPI_GETNONCLIENTMETRICS, 0, &nclm, 0);
  85     hFont = CreateFontIndirectW (&nclm.lfMessageFont);
  86     /* set button font */
  87     for (i=1; i < 12; i++)
  88         /* No button 8 (Close) */
  89         if (i != 8) {
  90             SendDlgItemMessageW (hwnd, i, WM_SETFONT, (WPARAM)hFont, 0);
  91         }
  92     /* set text font */
  93     SendDlgItemMessageW (hwnd, MSGBOX_IDTEXT, WM_SETFONT, (WPARAM)hFont, 0);
  94
  95     if (!IS_INTRESOURCE(lpmb->lpszCaption)) {
  96        SetWindowTextW(hwnd, lpmb->lpszCaption);
  97     } else {
  98         UINT len = LoadStringW( lpmb->hInstance, LOWORD(lpmb->lpszCaption), (LPWSTR)&ptr, 0 );
  99         if (!len) len = LoadStringW( user32_module, IDS_ERROR, (LPWSTR)&ptr, 0 );
 100         buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 101         if (buffer)
 102         {
 103             memcpy( buffer, ptr, len * sizeof(WCHAR) );
 104             buffer[len] = 0;
 105             SetWindowTextW( hwnd, buffer );
 106             HeapFree( GetProcessHeap(), 0, buffer );
 107             buffer = NULL;
 108         }
 109     }
 110     if (IS_INTRESOURCE(lpmb->lpszText)) {
 111         UINT len = LoadStringW( lpmb->hInstance, LOWORD(lpmb->lpszText), (LPWSTR)&ptr, 0 );
 112         lpszText = buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 113         if (buffer)
 114         {
 115             memcpy( buffer, ptr, len * sizeof(WCHAR) );
 116             buffer[len] = 0;
 117         }
 118     } else {
 119        lpszText = lpmb->lpszText;
 120     }
 121
 122     TRACE_(msgbox)("%s\n", debugstr_w(lpszText));
 123     SetWindowTextW(GetDlgItem(hwnd, MSGBOX_IDTEXT), lpszText);
 124
 125     /* Remove not selected buttons */
 126     switch(lpmb->dwStyle & MB_TYPEMASK) {
 127     case MB_OK:
 128         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 129         /* fall through */
 130     case MB_OKCANCEL:
 131         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 132         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 133         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 134         DestroyWindow(GetDlgItem(hwnd, IDYES));
 135         DestroyWindow(GetDlgItem(hwnd, IDNO));
 136         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 137         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 138         break;
 139     case MB_ABORTRETRYIGNORE:
 140         DestroyWindow(GetDlgItem(hwnd, IDOK));
 141         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 142         DestroyWindow(GetDlgItem(hwnd, IDYES));
 143         DestroyWindow(GetDlgItem(hwnd, IDNO));
 144         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 145         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 146         break;
 147     case MB_YESNO:
 148         DestroyWindow(GetDlgItem(hwnd, IDCANCEL));
 149         /* fall through */
 150     case MB_YESNOCANCEL:
 151         DestroyWindow(GetDlgItem(hwnd, IDOK));
 152         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 153         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 154         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 155         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 156         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 157         break;
 158     case MB_RETRYCANCEL:
 159         DestroyWindow(GetDlgItem(hwnd, IDOK));
 160         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 161         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 162         DestroyWindow(GetDlgItem(hwnd, IDYES));
 163         DestroyWindow(GetDlgItem(hwnd, IDNO));
 164         DestroyWindow(GetDlgItem(hwnd, IDCONTINUE));
 165         DestroyWindow(GetDlgItem(hwnd, IDTRYAGAIN));
 166         break;
 167     case MB_CANCELTRYCONTINUE:
 168         DestroyWindow(GetDlgItem(hwnd, IDOK));
 169         DestroyWindow(GetDlgItem(hwnd, IDABORT));
 170         DestroyWindow(GetDlgItem(hwnd, IDIGNORE));
 171         DestroyWindow(GetDlgItem(hwnd, IDYES));
 172         DestroyWindow(GetDlgItem(hwnd, IDNO));
 173         DestroyWindow(GetDlgItem(hwnd, IDRETRY));
 174     }
 175     /* Set the icon */
 176     switch(lpmb->dwStyle & MB_ICONMASK) {
 177     case MB_ICONEXCLAMATION:
 178         SendDlgItemMessageW(hwnd, stc1, STM_SETICON,
 179                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_EXCLAMATION), 0);
 180         break;
 181     case MB_ICONQUESTION:
 182         SendDlgItemMessageW(hwnd, stc1, STM_SETICON,
 183                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_QUESTION), 0);
 184         break;
 185     case MB_ICONASTERISK:
 186         SendDlgItemMessageW(hwnd, stc1, STM_SETICON,
 187                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_ASTERISK), 0);
 188         break;
 189     case MB_ICONHAND:
 190       SendDlgItemMessageW(hwnd, stc1, STM_SETICON,
 191                             (WPARAM)LoadIconW(0, (LPWSTR)IDI_HAND), 0);
 192       break;
 193     case MB_USERICON:
 194       SendDlgItemMessageW(hwnd, stc1, STM_SETICON,
 195                           (WPARAM)LoadIconW(lpmb->hInstance, lpmb->lpszIcon), 0);
 196       break;
 197     default:
 198         /* By default, Windows 95/98/NT do not associate an icon to message boxes.
 199          * So wine should do the same.
 200          */
 201         break;
 202     }
 203
 204     /* Remove Help button unless MB_HELP supplied */
 205     if (!(lpmb->dwStyle & MB_HELP)) {
 206         DestroyWindow(GetDlgItem(hwnd, IDHELP));
 207     }
 208
 209     /* Position everything */
 210     GetWindowRect(hwnd, &rect);
 211     borheight = rect.bottom - rect.top;
 212     borwidth  = rect.right - rect.left;
 213     GetClientRect(hwnd, &rect);
 214     borheight -= rect.bottom - rect.top;
 215     borwidth  -= rect.right - rect.left;
 216
 217     /* Get the icon height */
 218     GetWindowRect(GetDlgItem(hwnd, MSGBOX_IDICON), &rect);
 219     MapWindowPoints(0, hwnd, (LPPOINT)&rect, 2);
 220     if (!(lpmb->dwStyle & MB_ICONMASK))
 221     {
 222         rect.bottom = rect.top;
 223         rect.right = rect.left;
 224     }
 225     iheight = rect.bottom - rect.top;
 226     ileft = rect.left;
 227     iwidth = rect.right - ileft;
 228
 229     hdc = GetDC(hwnd);
 230     if (hFont)
 231         hPrevFont = SelectObject(hdc, hFont);
 232
 233     /* Get the number of visible buttons and their size */
 234     bh = bw = 1; /* Minimum button sizes */
 235     for (buttons = 0, i = 1; i < 12; i++)
 236     {
 237         if (i == 8) continue; /* No CLOSE button */
 238         hItem = GetDlgItem(hwnd, i);
 239         if (GetWindowLongW(hItem, GWL_STYLE) & WS_VISIBLE)
 240         {
 241             WCHAR buttonText[1024];
 242             int w, h;
 243             buttons++;
 244             if (GetWindowTextW(hItem, buttonText, 1024))
 245             {
 246                 DrawTextW( hdc, buttonText, -1, &rect, DT_LEFT | DT_EXPANDTABS | DT_CALCRECT);
 247                 h = rect.bottom - rect.top;
 248                 w = rect.right - rect.left;
 249                 if (h > bh) bh = h;
 250                 if (w > bw)  bw = w ;
 251             }
 252         }
 253     }
 254     bw = max(bw, bh * 2);
 255     /* Button white space */
 256     bh = bh * 2;
 257     bw = bw * 2;
 258     bspace = bw/3; /* Space between buttons */
 259
 260     /* Get the text size */
 261     GetClientRect(GetDlgItem(hwnd, MSGBOX_IDTEXT), &rect);
 262     rect.top = rect.left = rect.bottom = 0;
 263     DrawTextW( hdc, lpszText, -1, &rect,
 264                DT_LEFT | DT_EXPANDTABS | DT_WORDBREAK | DT_CALCRECT);
 265     /* Min text width corresponds to space for the buttons */
 266     tleft = ileft;
 267     if (iwidth) tleft += ileft + iwidth;
 268     twidth = max((bw + bspace) * buttons + bspace - tleft, rect.right);
 269     theight = rect.bottom;
 270
 271     if (hFont)
 272         SelectObject(hdc, hPrevFont);
 273     ReleaseDC(hwnd, hdc);
 274
 275     tiheight = 16 + max(iheight, theight);
 276     wwidth  = tleft + twidth + ileft + borwidth;
 277     wheight = 8 + tiheight + bh + borheight;
 278
 279     /* Message boxes are always desktop centered, so query desktop size and center window */
 280     monitor = MonitorFromWindow(lpmb->hwndOwner ? lpmb->hwndOwner : GetActiveWindow(), MONITOR_DEFAULTTOPRIMARY);
 281     mon_info.cbSize = sizeof(mon_info);
 282     GetMonitorInfoW(monitor, &mon_info);
 283     wleft = (mon_info.rcWork.left + mon_info.rcWork.right - wwidth) / 2;
 284     wtop = (mon_info.rcWork.top + mon_info.rcWork.bottom - wheight) / 2;
 285
 286     /* Resize and center the window */
 287     SetWindowPos(hwnd, 0, wleft, wtop, wwidth, wheight,
 288                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 289
 290     /* Position the icon */
 291     SetWindowPos(GetDlgItem(hwnd, MSGBOX_IDICON), 0, ileft, (tiheight - iheight) / 2, 0, 0,
 292                  SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 293
 294     /* Position the text */
 295     SetWindowPos(GetDlgItem(hwnd, MSGBOX_IDTEXT), 0, tleft, (tiheight - theight) / 2, twidth, theight,
 296                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
 297
 298     /* Position the buttons */
 299     bpos = (wwidth - (bw + bspace) * buttons + bspace) / 2;
 300     for (buttons = i = 0; i < (sizeof(buttonOrder) / sizeof(buttonOrder[0])); i++) {
 301
 302         /* Convert the button order to ID* value to order for the buttons */
 303         hItem = GetDlgItem(hwnd, buttonOrder[i]);
 304         if (GetWindowLongW(hItem, GWL_STYLE) & WS_VISIBLE) {
 305             if (buttons++ == ((lpmb->dwStyle & MB_DEFMASK) >> 8)) {
 306                 SetFocus(hItem);
 307                 SendMessageW( hItem, BM_SETSTYLE, BS_DEFPUSHBUTTON, TRUE );
 308             }
 309             SetWindowPos(hItem, 0, bpos, tiheight, bw, bh,
 310                          SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOREDRAW);
 311             bpos += bw + bspace;
 312         }
 313     }
 314
 315     /*handle modal message boxes*/
 316     if (((lpmb->dwStyle & MB_TASKMODAL) && (lpmb->hwndOwner==NULL)) || (lpmb->dwStyle & MB_SYSTEMMODAL))
 317         SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
 318
 319     HeapFree( GetProcessHeap(), 0, buffer );
 320     return hFont;
 321 }
 322
 323
 324 /**************************************************************************
 325  *           MSGBOX_DlgProc
 326  *
 327  * Dialog procedure for message boxes.
 328  */
 329 static INT_PTR CALLBACK MSGBOX_DlgProc( HWND hwnd, UINT message,
 330                                         WPARAM wParam, LPARAM lParam )
 331 {
 332   HFONT hFont;
 333
 334   switch(message) {
 335    case WM_INITDIALOG:
 336    {
 337        LPMSGBOXPARAMSW mbp = (LPMSGBOXPARAMSW)lParam;
 338        SetWindowContextHelpId(hwnd, mbp->dwContextHelpId);
 339        hFont = MSGBOX_OnInit(hwnd, mbp);
 340        SetPropA(hwnd, "WINE_MSGBOX_HFONT", hFont);
 341        SetPropA(hwnd, "WINE_MSGBOX_HELPCALLBACK", mbp->lpfnMsgBoxCallback);
 342        break;
 343    }
 344
 345    case WM_COMMAND:
 346     switch (LOWORD(wParam))
 347     {
 348      case IDOK:
 349      case IDCANCEL:
 350      case IDABORT:
 351      case IDRETRY:
 352      case IDIGNORE:
 353      case IDYES:
 354      case IDNO:
 355      case IDTRYAGAIN:
 356      case IDCONTINUE:
 357       hFont = GetPropA(hwnd, "WINE_MSGBOX_HFONT");
 358       EndDialog(hwnd, wParam);
 359       if (hFont)
 360           DeleteObject(hFont);
 361       break;
 362      case IDHELP:
 363       FIXME("Help button not supported yet\n");
 364       break;
 365     }
 366     break;
 367
 368     case WM_HELP:
 369     {
 370         MSGBOXCALLBACK callback = (MSGBOXCALLBACK)GetPropA(hwnd, "WINE_MSGBOX_HELPCALLBACK");
 371         HELPINFO hi;
 372
 373         memcpy(&hi, (void *)lParam, sizeof(hi));
 374         hi.dwContextId = GetWindowContextHelpId(hwnd);
 375
 376         if (callback)
 377             callback(&hi);
 378         else
 379             SendMessageW(GetWindow(hwnd, GW_OWNER), WM_HELP, 0, (LPARAM)&hi);
 380         break;
 381    }
 382
 383    default:
 384      /* Ok. Ignore all the other messages */
 385      TRACE("Message number 0x%04x is being ignored.\n", message);
 386     break;
 387   }
 388   return 0;
 389 }
 390
 391
 392 /**************************************************************************
 393  *              MessageBoxA (USER32.@)
 394  */
 395 INT WINAPI MessageBoxA(HWND hWnd, LPCSTR text, LPCSTR title, UINT type)
 396 {
 397     return MessageBoxExA(hWnd, text, title, type, LANG_NEUTRAL);
 398 }
 399
 400
 401 /**************************************************************************
 402  *              MessageBoxW (USER32.@)
 403  */
 404 INT WINAPI MessageBoxW( HWND hwnd, LPCWSTR text, LPCWSTR title, UINT type )
 405 {
 406     return MessageBoxExW(hwnd, text, title, type, LANG_NEUTRAL);
 407 }
 408
 409
 410 /**************************************************************************
 411  *              MessageBoxExA (USER32.@)
 412  */
 413 INT WINAPI MessageBoxExA( HWND hWnd, LPCSTR text, LPCSTR title,
 414                               UINT type, WORD langid )
 415 {
 416     MSGBOXPARAMSA msgbox;
 417
 418     msgbox.cbSize = sizeof(msgbox);
 419     msgbox.hwndOwner = hWnd;
 420     msgbox.hInstance = 0;
 421     msgbox.lpszText = text;
 422     msgbox.lpszCaption = title;
 423     msgbox.dwStyle = type;
 424     msgbox.lpszIcon = NULL;
 425     msgbox.dwContextHelpId = 0;
 426     msgbox.lpfnMsgBoxCallback = NULL;
 427     msgbox.dwLanguageId = langid;
 428
 429     return MessageBoxIndirectA(&msgbox);
 430 }
 431
 432 /**************************************************************************
 433  *              MessageBoxExW (USER32.@)
 434  */
 435 INT WINAPI MessageBoxExW( HWND hWnd, LPCWSTR text, LPCWSTR title,
 436                               UINT type, WORD langid )
 437 {
 438     MSGBOXPARAMSW msgbox;
 439
 440     msgbox.cbSize = sizeof(msgbox);
 441     msgbox.hwndOwner = hWnd;
 442     msgbox.hInstance = 0;
 443     msgbox.lpszText = text;
 444     msgbox.lpszCaption = title;
 445     msgbox.dwStyle = type;
 446     msgbox.lpszIcon = NULL;
 447     msgbox.dwContextHelpId = 0;
 448     msgbox.lpfnMsgBoxCallback = NULL;
 449     msgbox.dwLanguageId = langid;
 450
 451     return MessageBoxIndirectW(&msgbox);
 452 }
 453
 454 /**************************************************************************
 455  *              MessageBoxIndirectA (USER32.@)
 456  */
 457 INT WINAPI MessageBoxIndirectA( LPMSGBOXPARAMSA msgbox )
 458 {
 459     MSGBOXPARAMSW msgboxW;
 460     UNICODE_STRING textW, captionW, iconW;
 461     int ret;
 462
 463     if (IS_INTRESOURCE(msgbox->lpszText))
 464         textW.Buffer = (LPWSTR)msgbox->lpszText;
 465     else
 466         RtlCreateUnicodeStringFromAsciiz(&textW, msgbox->lpszText);
 467     if (IS_INTRESOURCE(msgbox->lpszCaption))
 468         captionW.Buffer = (LPWSTR)msgbox->lpszCaption;
 469     else
 470         RtlCreateUnicodeStringFromAsciiz(&captionW, msgbox->lpszCaption);
 471
 472     if (msgbox->dwStyle & MB_USERICON)
 473     {
 474         if (IS_INTRESOURCE(msgbox->lpszIcon))
 475             iconW.Buffer = (LPWSTR)msgbox->lpszIcon;
 476         else
 477             RtlCreateUnicodeStringFromAsciiz(&iconW, msgbox->lpszIcon);
 478     }
 479     else
 480         iconW.Buffer = NULL;
 481
 482     msgboxW.cbSize = sizeof(msgboxW);
 483     msgboxW.hwndOwner = msgbox->hwndOwner;
 484     msgboxW.hInstance = msgbox->hInstance;
 485     msgboxW.lpszText = textW.Buffer;
 486     msgboxW.lpszCaption = captionW.Buffer;
 487     msgboxW.dwStyle = msgbox->dwStyle;
 488     msgboxW.lpszIcon = iconW.Buffer;
 489     msgboxW.dwContextHelpId = msgbox->dwContextHelpId;
 490     msgboxW.lpfnMsgBoxCallback = msgbox->lpfnMsgBoxCallback;
 491     msgboxW.dwLanguageId = msgbox->dwLanguageId;
 492
 493     ret = MessageBoxIndirectW(&msgboxW);
 494
 495     if (!IS_INTRESOURCE(textW.Buffer)) RtlFreeUnicodeString(&textW);
 496     if (!IS_INTRESOURCE(captionW.Buffer)) RtlFreeUnicodeString(&captionW);
 497     if (!IS_INTRESOURCE(iconW.Buffer)) RtlFreeUnicodeString(&iconW);
 498     return ret;
 499 }
 500
 501 /**************************************************************************
 502  *              MessageBoxIndirectW (USER32.@)
 503  */
 504 INT WINAPI MessageBoxIndirectW( LPMSGBOXPARAMSW msgbox )
 505 {
 506     LPVOID tmplate;
 507     HRSRC hRes;
 508     int ret;
 509     UINT i;
 510     struct ThreadWindows threadWindows;
 511     static const WCHAR msg_box_res_nameW[] = { 'M','S','G','B','O','X',0 };
 512
 513     if (!(hRes = FindResourceExW(user32_module, (LPWSTR)RT_DIALOG,
 514                                  msg_box_res_nameW, msgbox->dwLanguageId)))
 515     {
 516         if (!msgbox->dwLanguageId ||
 517             !(hRes = FindResourceExW(user32_module, (LPWSTR)RT_DIALOG, msg_box_res_nameW, LANG_NEUTRAL)))
 518             return 0;
 519     }
 520     if (!(tmplate = LoadResource(user32_module, hRes)))
 521         return 0;
 522
 523     if ((msgbox->dwStyle & MB_TASKMODAL) && (msgbox->hwndOwner==NULL))
 524     {
 525         threadWindows.numHandles = 0;
 526         threadWindows.numAllocs = 10;
 527         threadWindows.handles = HeapAlloc(GetProcessHeap(), 0, 10*sizeof(HWND));
 528         EnumThreadWindows(GetCurrentThreadId(), MSGBOX_EnumProc, (LPARAM)&threadWindows);
 529     }
 530
 531     ret=DialogBoxIndirectParamW(msgbox->hInstance, tmplate,
 532                                 msgbox->hwndOwner, MSGBOX_DlgProc, (LPARAM)msgbox);
 533
 534     if ((msgbox->dwStyle & MB_TASKMODAL) && (msgbox->hwndOwner==NULL))
 535     {
 536         for (i = 0; i < threadWindows.numHandles; i++)
 537             EnableWindow(threadWindows.handles[i], TRUE);
 538         HeapFree(GetProcessHeap(), 0, threadWindows.handles);
 539     }
 540     return ret;
 541 }