src/msw/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "app.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #if defined(__BORLANDC__)
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/frame.h"
  33     #include "wx/app.h"
  34     #include "wx/utils.h"
  35     #include "wx/gdicmn.h"
  36     #include "wx/pen.h"
  37     #include "wx/brush.h"
  38     #include "wx/cursor.h"
  39     #include "wx/icon.h"
  40     #include "wx/palette.h"
  41     #include "wx/dc.h"
  42     #include "wx/dialog.h"
  43     #include "wx/msgdlg.h"
  44     #include "wx/intl.h"
  45     #include "wx/dynarray.h"
  46     #include "wx/wxchar.h"
  47     #include "wx/icon.h"
  48 #endif
  49
  50 #include "wx/log.h"
  51 #include "wx/module.h"
  52
  53 #include "wx/msw/private.h"
  54
  55 #if wxUSE_THREADS
  56     #include "wx/thread.h"
  57
  58     // define the array of MSG strutures
  59     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  60
  61     #include "wx/arrimpl.cpp"
  62
  63     WX_DEFINE_OBJARRAY(wxMsgArray);
  64 #endif // wxUSE_THREADS
  65
  66 #if wxUSE_WX_RESOURCES
  67     #include "wx/resource.h"
  68 #endif
  69
  70 #if wxUSE_TOOLTIPS
  71     #include "wx/tooltip.h"
  72 #endif // wxUSE_TOOLTIPS
  73
  74 // OLE is used for drag-and-drop, clipboard, OLE Automation..., but some
  75 // compilers don't support it (missing headers, libs, ...)
  76 #if defined(__GNUWIN32_OLD__) || defined(__SC__) || defined(__SALFORDC__)
  77     #undef wxUSE_OLE
  78
  79     #define  wxUSE_OLE 0
  80 #endif // broken compilers
  81
  82 #if wxUSE_OLE
  83     #include <ole2.h>
  84 #endif
  85
  86 #include <string.h>
  87 #include <ctype.h>
  88
  89 #if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__) || defined(__WXMICROWIN__)) && !defined(__CYGWIN10__))
  90     #include <commctrl.h>
  91 #endif
  92
  93 #ifndef __WXMICROWIN__
  94 #include "wx/msw/msvcrt.h"
  95 #endif
  96
  97 // ----------------------------------------------------------------------------
  98 // conditional compilation
  99 // ----------------------------------------------------------------------------
 100
 101 // The macro _WIN32_IE is defined by commctrl.h (unless it had already been
 102 // defined before) and shows us what common control features are available
 103 // during the compile time (it doesn't mean that they will be available during
 104 // the run-time, use GetComCtl32Version() to test for them!). The possible
 105 // values are:
 106 //
 107 // 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
 108 // 0x0300                      4.70              IE 3.x
 109 // 0x0400                      4.71              IE 4.0
 110 // 0x0401                      4.72              IE 4.01 and Win98
 111 // 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
 112
 113 #ifndef _WIN32_IE
 114     // minimal set of features by default
 115     #define _WIN32_IE 0x0200
 116 #endif
 117
 118 #if _WIN32_IE >= 0x0300
 119     #include <shlwapi.h>
 120 #endif
 121
 122 // ---------------------------------------------------------------------------
 123 // global variables
 124 // ---------------------------------------------------------------------------
 125
 126 extern wxChar *wxBuffer;
 127 extern wxList *wxWinHandleList;
 128 extern wxList WXDLLEXPORT wxPendingDelete;
 129 #ifndef __WXMICROWIN__
 130 extern void wxSetKeyboardHook(bool doIt);
 131 #endif
 132
 133 MSG s_currentMsg;
 134 wxApp *wxTheApp = NULL;
 135
 136 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 137 //     with NR suffix - wxWindow::MSWCreate() supposes this
 138 const wxChar *wxFrameClassName         = wxT("wxFrameClass");
 139 const wxChar *wxFrameClassNameNoRedraw = wxT("wxFrameClassNR");
 140 const wxChar *wxMDIFrameClassName      = wxT("wxMDIFrameClass");
 141 const wxChar *wxMDIFrameClassNameNoRedraw = wxT("wxMDIFrameClassNR");
 142 const wxChar *wxMDIChildFrameClassName = wxT("wxMDIChildFrameClass");
 143 const wxChar *wxMDIChildFrameClassNameNoRedraw = wxT("wxMDIChildFrameClassNR");
 144 const wxChar *wxPanelClassName         = wxT("wxPanelClass");
 145 const wxChar *wxPanelClassNameNR       = wxT("wxPanelClassNR");
 146 const wxChar *wxCanvasClassName        = wxT("wxCanvasClass");
 147 const wxChar *wxCanvasClassNameNR      = wxT("wxCanvasClassNR");
 148
 149 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 150 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 151 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 152
 153 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 154 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 155 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 156
 157 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 158
 159 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 160
 161 // FIXME wxUSE_ON_FATAL_EXCEPTION is only supported for VC++ now because it
 162 //       needs compiler support for Win32 SEH. Others (especially Borland)
 163 //       probably have it too, but I'm not sure about how it works
 164 // JACS: get 'Cannot use __try in functions that require unwinding
 165 // in Unicode mode, so disabling.
 166 #if !defined(__VISUALC__) || defined(__WIN16__) || defined(UNICODE)
 167     #undef wxUSE_ON_FATAL_EXCEPTION
 168     #define wxUSE_ON_FATAL_EXCEPTION 0
 169 #endif // VC++
 170
 171 #if wxUSE_ON_FATAL_EXCEPTION
 172     static bool gs_handleExceptions = FALSE;
 173 #endif
 174
 175 // ===========================================================================
 176 // implementation
 177 // ===========================================================================
 178
 179 // ---------------------------------------------------------------------------
 180 // wxApp
 181 // ---------------------------------------------------------------------------
 182
 183 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 184
 185 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 186     EVT_IDLE(wxApp::OnIdle)
 187     EVT_END_SESSION(wxApp::OnEndSession)
 188     EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 189 END_EVENT_TABLE()
 190
 191 //// Initialize
 192 bool wxApp::Initialize()
 193 {
 194     // the first thing to do is to check if we're trying to run an Unicode
 195     // program under Win9x - if so, abort right now as it has no chance to
 196     // work
 197 #if wxUSE_UNICODE
 198     if ( wxGetOsVersion() != wxWINDOWS_NT )
 199     {
 200         // note that we can use MessageBoxW() as it's implemented even under
 201         // Win9x - OTOH, we can't use wxGetTranslation() because the file APIs
 202         // used by wxLocale are not
 203         ::MessageBox
 204         (
 205          NULL,
 206          _T("This program uses Unicode and requires Windows NT/2000.\nProgram aborted."),
 207          _T("wxWindows Fatal Error"),
 208          MB_ICONERROR | MB_OK
 209         );
 210
 211         return FALSE;
 212     }
 213 #endif // wxUSE_UNICODE
 214
 215     // Some people may wish to use this, but
 216     // probably it shouldn't be here by default.
 217 #ifdef __WXDEBUG__
 218     //    wxRedirectIOToConsole();
 219 #endif
 220
 221     wxBuffer = new wxChar[1500]; // FIXME
 222
 223     wxClassInfo::InitializeClasses();
 224
 225 #if wxUSE_THREADS
 226     wxPendingEventsLocker = new wxCriticalSection;
 227 #endif
 228
 229     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 230     wxTheColourDatabase->Initialize();
 231
 232     wxInitializeStockLists();
 233     wxInitializeStockObjects();
 234
 235 #if wxUSE_WX_RESOURCES
 236     wxInitializeResourceSystem();
 237 #endif
 238
 239     wxBitmap::InitStandardHandlers();
 240
 241 #if defined(__WIN95__) && !defined(__WXMICROWIN__)
 242     InitCommonControls();
 243 #endif // __WIN95__
 244
 245 #if wxUSE_OLE || wxUSE_DRAG_AND_DROP || wxUSE_DATAOBJ
 246
 247 #ifdef __WIN16__
 248     // for OLE, enlarge message queue to be as large as possible
 249     int iMsg = 96;
 250     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 251         ;
 252 #endif // Win16
 253     // we need to initialize OLE library
 254     if ( FAILED(::OleInitialize(NULL)) )
 255         wxLogError(_("Cannot initialize OLE"));
 256
 257 #endif // wxUSE_OLE
 258
 259 #if wxUSE_CTL3D
 260     if (!Ctl3dRegister(wxhInstance))
 261         wxLogError(wxT("Cannot register CTL3D"));
 262
 263     Ctl3dAutoSubclass(wxhInstance);
 264 #endif // wxUSE_CTL3D
 265
 266     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 267 #if 0
 268     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 269     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 270     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 271
 272     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 273     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 274     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 275 #endif // 0
 276
 277     RegisterWindowClasses();
 278
 279 #ifndef __WXMICROWIN__
 280     // Create the brush for disabling bitmap buttons
 281
 282     LOGBRUSH lb;
 283     lb.lbStyle = BS_PATTERN;
 284     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 285     if ( lb.lbHatch )
 286     {
 287         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 288         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 289     }
 290     //else: wxWindows resources are probably not linked in
 291 #endif
 292
 293 #if wxUSE_PENWINDOWS
 294     wxRegisterPenWin();
 295 #endif
 296
 297     wxWinHandleList = new wxList(wxKEY_INTEGER);
 298
 299     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 300     // PLEASE DO NOT ALTER THIS.
 301 #if defined(__VISUALC__) && defined(__WIN16__) && !defined(WXMAKINGDLL)
 302     extern char wxDummyChar;
 303     if (wxDummyChar) wxDummyChar++;
 304 #endif
 305
 306 #ifndef __WXMICROWIN__
 307     wxSetKeyboardHook(TRUE);
 308 #endif
 309
 310     wxModule::RegisterModules();
 311     if (!wxModule::InitializeModules())
 312         return FALSE;
 313     return TRUE;
 314 }
 315
 316 // ---------------------------------------------------------------------------
 317 // RegisterWindowClasses
 318 // ---------------------------------------------------------------------------
 319
 320 // TODO we should only register classes really used by the app. For this it
 321 //      would be enough to just delay the class registration until an attempt
 322 //      to create a window of this class is made.
 323 bool wxApp::RegisterWindowClasses()
 324 {
 325     WNDCLASS wndclass;
 326
 327     // for each class we register one with CS_(V|H)REDRAW style and one
 328     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 329     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 330     static const long styleNoRedraw = CS_DBLCLKS;
 331
 332     // the fields which are common to all classes
 333     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 334     wndclass.cbClsExtra    = 0;
 335     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 336     wndclass.hInstance     = wxhInstance;
 337     wndclass.hIcon         = (HICON) NULL;
 338     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 339     wndclass.lpszMenuName  = NULL;
 340
 341     // Register the frame window class.
 342     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 343     wndclass.lpszClassName = wxFrameClassName;
 344     wndclass.style         = styleNormal;
 345
 346     if ( !RegisterClass(&wndclass) )
 347     {
 348         wxLogLastError(wxT("RegisterClass(frame)"));
 349
 350         return FALSE;
 351     }
 352
 353     // "no redraw" frame
 354     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 355     wndclass.style         = styleNoRedraw;
 356
 357     if ( !RegisterClass(&wndclass) )
 358     {
 359         wxLogLastError(wxT("RegisterClass(no redraw frame)"));
 360
 361         return FALSE;
 362     }
 363
 364     // Register the MDI frame window class.
 365     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 366     wndclass.lpszClassName = wxMDIFrameClassName;
 367     wndclass.style         = styleNormal;
 368
 369     if ( !RegisterClass(&wndclass) )
 370     {
 371         wxLogLastError(wxT("RegisterClass(MDI parent)"));
 372
 373         return FALSE;
 374     }
 375
 376     // "no redraw" MDI frame
 377     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 378     wndclass.style         = styleNoRedraw;
 379
 380     if ( !RegisterClass(&wndclass) )
 381     {
 382         wxLogLastError(wxT("RegisterClass(no redraw MDI parent frame)"));
 383
 384         return FALSE;
 385     }
 386
 387     // Register the MDI child frame window class.
 388     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 389     wndclass.lpszClassName = wxMDIChildFrameClassName;
 390     wndclass.style         = styleNormal;
 391
 392     if ( !RegisterClass(&wndclass) )
 393     {
 394         wxLogLastError(wxT("RegisterClass(MDI child)"));
 395
 396         return FALSE;
 397     }
 398
 399     // "no redraw" MDI child frame
 400     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 401     wndclass.style         = styleNoRedraw;
 402
 403     if ( !RegisterClass(&wndclass) )
 404     {
 405         wxLogLastError(wxT("RegisterClass(no redraw MDI child)"));
 406
 407         return FALSE;
 408     }
 409
 410     // Register the panel window class.
 411     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 412     wndclass.lpszClassName = wxPanelClassName;
 413     wndclass.style         = styleNormal;
 414
 415     if ( !RegisterClass(&wndclass) )
 416     {
 417         wxLogLastError(wxT("RegisterClass(panel)"));
 418
 419         return FALSE;
 420     }
 421
 422     // Register the no redraw panel window class.
 423     wndclass.lpszClassName = wxPanelClassNameNR;
 424     wndclass.style         = styleNoRedraw;
 425
 426     if ( !RegisterClass(&wndclass) )
 427     {
 428         wxLogLastError(wxT("RegisterClass(no redraw panel)"));
 429
 430         return FALSE;
 431     }
 432
 433     // Register the canvas and textsubwindow class name
 434     wndclass.hbrBackground = (HBRUSH)NULL;
 435     wndclass.lpszClassName = wxCanvasClassName;
 436
 437     if ( !RegisterClass(&wndclass) )
 438     {
 439         wxLogLastError(wxT("RegisterClass(canvas)"));
 440
 441         return FALSE;
 442     }
 443
 444     wndclass.lpszClassName = wxCanvasClassNameNR;
 445     wndclass.style         = styleNoRedraw;
 446     if ( !RegisterClass(&wndclass) )
 447     {
 448         wxLogLastError(wxT("RegisterClass(no redraw canvas)"));
 449
 450         return FALSE;
 451     }
 452
 453     return TRUE;
 454 }
 455
 456 // ---------------------------------------------------------------------------
 457 // Convert Windows to argc, argv style
 458 // ---------------------------------------------------------------------------
 459
 460 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 461 {
 462     wxStringList args;
 463
 464     wxString cmdLine(lpCmdLine);
 465     int count = 0;
 466
 467     // Get application name
 468     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 469     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 470
 471     args.Add(name);
 472     count++;
 473
 474     wxStrcpy(name, wxFileNameFromPath(name));
 475     wxStripExtension(name);
 476     wxTheApp->SetAppName(name);
 477
 478     // Break up string
 479     // Treat strings enclosed in double-quotes as single arguments
 480     int i = 0;
 481     int len = cmdLine.Length();
 482     while (i < len)
 483     {
 484         // Skip whitespace
 485         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 486             i ++;
 487
 488         if (i < len)
 489         {
 490             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 491             {
 492                 i ++;
 493                 int first = i;
 494                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 495                     i ++;
 496
 497                 wxString arg(cmdLine.Mid(first, (i - first)));
 498
 499                 args.Add(arg);
 500                 count ++;
 501
 502                 if (i < len)
 503                     i ++; // Skip past 2nd quote
 504             }
 505             else // Unquoted argument
 506             {
 507                 int first = i;
 508                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 509                     i ++;
 510
 511                 wxString arg(cmdLine.Mid(first, (i - first)));
 512
 513                 args.Add(arg);
 514                 count ++;
 515             }
 516         }
 517     }
 518
 519     wxTheApp->argv = new wxChar*[count + 1];
 520     for (i = 0; i < count; i++)
 521     {
 522         wxString arg(args[i]);
 523         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 524     }
 525     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 526     wxTheApp->argc = count;
 527 }
 528
 529 //// Cleans up any wxWindows internal structures left lying around
 530
 531 void wxApp::CleanUp()
 532 {
 533     //// COMMON CLEANUP
 534
 535 #if wxUSE_LOG
 536     // flush the logged messages if any and install a 'safer' log target: the
 537     // default one (wxLogGui) can't be used after the resources are freed just
 538     // below and the user suppliedo ne might be even more unsafe (using any
 539     // wxWindows GUI function is unsafe starting from now)
 540     wxLog::DontCreateOnDemand();
 541
 542     // this will flush the old messages if any
 543     delete wxLog::SetActiveTarget(new wxLogStderr);
 544 #endif // wxUSE_LOG
 545
 546     // One last chance for pending objects to be cleaned up
 547     wxTheApp->DeletePendingObjects();
 548
 549     wxModule::CleanUpModules();
 550
 551 #if wxUSE_WX_RESOURCES
 552     wxCleanUpResourceSystem();
 553
 554     //  wxDefaultResourceTable->ClearTable();
 555 #endif
 556
 557     wxDeleteStockObjects();
 558
 559     // Destroy all GDI lists, etc.
 560     wxDeleteStockLists();
 561
 562     delete wxTheColourDatabase;
 563     wxTheColourDatabase = NULL;
 564
 565     wxBitmap::CleanUpHandlers();
 566
 567     delete[] wxBuffer;
 568     wxBuffer = NULL;
 569
 570     //// WINDOWS-SPECIFIC CLEANUP
 571
 572 #ifndef __WXMICROWIN__
 573     wxSetKeyboardHook(FALSE);
 574 #endif
 575
 576 #if wxUSE_PENWINDOWS
 577     wxCleanUpPenWin();
 578 #endif
 579
 580     if (wxSTD_FRAME_ICON)
 581         DestroyIcon(wxSTD_FRAME_ICON);
 582     if (wxSTD_MDICHILDFRAME_ICON)
 583         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 584     if (wxSTD_MDIPARENTFRAME_ICON)
 585         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 586
 587     if (wxDEFAULT_FRAME_ICON)
 588         DestroyIcon(wxDEFAULT_FRAME_ICON);
 589     if (wxDEFAULT_MDICHILDFRAME_ICON)
 590         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 591     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 592         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 593
 594     if ( wxDisableButtonBrush )
 595         ::DeleteObject( wxDisableButtonBrush );
 596
 597 #if wxUSE_OLE
 598     ::OleUninitialize();
 599 #endif
 600
 601 #if wxUSE_CTL3D
 602     Ctl3dUnregister(wxhInstance);
 603 #endif
 604
 605     if (wxWinHandleList)
 606         delete wxWinHandleList;
 607
 608     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 609     // create a module for that as it's part of the core.
 610     delete wxPendingEvents;
 611
 612 #if wxUSE_THREADS
 613     delete wxPendingEventsLocker;
 614     // If we don't do the following, we get an apparent memory leak
 615 #if wxUSE_VALIDATORS
 616     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 617 #endif // wxUSE_VALIDATORS
 618 #endif // wxUSE_THREADS
 619
 620     wxClassInfo::CleanUpClasses();
 621
 622     delete wxTheApp;
 623     wxTheApp = NULL;
 624
 625 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 626     // At this point we want to check if there are any memory
 627     // blocks that aren't part of the wxDebugContext itself,
 628     // as a special case. Then when dumping we need to ignore
 629     // wxDebugContext, too.
 630     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 631     {
 632         wxLogMessage(wxT("There were memory leaks."));
 633         wxDebugContext::Dump();
 634         wxDebugContext::PrintStatistics();
 635     }
 636     //  wxDebugContext::SetStream(NULL, NULL);
 637 #endif
 638
 639 #if wxUSE_LOG
 640     // do it as the very last thing because everything else can log messages
 641     delete wxLog::SetActiveTarget(NULL);
 642 #endif // wxUSE_LOG
 643 }
 644
 645 //----------------------------------------------------------------------
 646 // Entry point helpers, used by wxPython
 647 //----------------------------------------------------------------------
 648
 649 int WXDLLEXPORT wxEntryStart( int WXUNUSED(argc), char** WXUNUSED(argv) )
 650 {
 651     return wxApp::Initialize();
 652 }
 653
 654 int WXDLLEXPORT wxEntryInitGui()
 655 {
 656     return wxTheApp->OnInitGui();
 657 }
 658
 659 void WXDLLEXPORT wxEntryCleanup()
 660 {
 661     wxApp::CleanUp();
 662 }
 663
 664
 665 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 666
 667 // temporarily disable this warning which would be generated in release builds
 668 // because of __try
 669 #ifdef __VISUALC__
 670     #pragma warning(disable: 4715) // not all control paths return a value
 671 #endif // Visual C++
 672
 673 //----------------------------------------------------------------------
 674 // Main wxWindows entry point
 675 //----------------------------------------------------------------------
 676 int wxEntry(WXHINSTANCE hInstance,
 677             WXHINSTANCE WXUNUSED(hPrevInstance),
 678             char *lpCmdLine,
 679             int nCmdShow,
 680             bool enterLoop)
 681 {
 682     // do check for memory leaks on program exit
 683     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 684     //  deallocated memory which may be used to simulate low-memory condition)
 685 #ifndef __WXMICROWIN__
 686     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 687 #endif
 688
 689 #ifdef __MWERKS__
 690 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 691     // This seems to be necessary since there are 'rogue'
 692     // objects present at this point (perhaps global objects?)
 693     // Setting a checkpoint will ignore them as far as the
 694     // memory checking facility is concerned.
 695     // Of course you may argue that memory allocated in globals should be
 696     // checked, but this is a reasonable compromise.
 697     wxDebugContext::SetCheckpoint();
 698 #endif
 699 #endif
 700
 701     // take everything into a try-except block to be able to call
 702     // OnFatalException() if necessary
 703 #if wxUSE_ON_FATAL_EXCEPTION
 704     __try {
 705 #endif
 706         wxhInstance = (HINSTANCE) hInstance;
 707
 708         if (!wxEntryStart(0,0))
 709             return 0;
 710
 711         // create the application object or ensure that one already exists
 712         if (!wxTheApp)
 713         {
 714             // The app may have declared a global application object, but we recommend
 715             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 716             // function for delayed, dynamic app object construction.
 717             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 718                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 719
 720             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 721         }
 722
 723         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 724
 725         // save the WinMain() parameters
 726         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 727         wxTheApp->m_nCmdShow = nCmdShow;
 728
 729         // We really don't want timestamps by default, because it means
 730         // we can't simply double-click on the error message and get to that
 731         // line in the source. So VC++ at least, let's have a sensible default.
 732 #ifdef __VISUALC__
 733         wxLog::SetTimestamp(NULL);
 734 #endif
 735
 736         int retValue = 0;
 737
 738         // it is common to create a modal dialog in OnInit() (to ask/notify the
 739         // user about something) but it wouldn't work if we don't change the
 740         // "exit on delete last frame" flag here as when this dialog is
 741         // deleted, the app would terminate (it was the last top level window
 742         // as the main frame wasn't created yet!), so disable this behaviour
 743         // temproarily
 744         bool exitOnLastFrameDelete = wxTheApp->GetExitOnFrameDelete();
 745         wxTheApp->SetExitOnFrameDelete(FALSE);
 746
 747         // init the app
 748         retValue = wxEntryInitGui() && wxTheApp->OnInit() ? 0 : -1;
 749
 750         // restore the old flag value
 751         wxTheApp->SetExitOnFrameDelete(exitOnLastFrameDelete);
 752
 753         if ( retValue == 0 )
 754         {
 755             if ( enterLoop )
 756             {
 757                 // run the main loop
 758                 retValue = wxTheApp->OnRun();
 759             }
 760             else
 761             {
 762                 // we want to initialize, but not run or exit immediately.
 763                 return 1;
 764             }
 765         }
 766         //else: app initialization failed, so we skipped OnRun()
 767
 768         wxWindow *topWindow = wxTheApp->GetTopWindow();
 769         if ( topWindow )
 770         {
 771             // Forcibly delete the window.
 772             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 773                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 774             {
 775                 topWindow->Close(TRUE);
 776                 wxTheApp->DeletePendingObjects();
 777             }
 778             else
 779             {
 780                 delete topWindow;
 781                 wxTheApp->SetTopWindow(NULL);
 782             }
 783         }
 784
 785         wxTheApp->OnExit();
 786
 787         wxEntryCleanup();
 788
 789         return retValue;
 790
 791 #if wxUSE_ON_FATAL_EXCEPTION
 792     }
 793     __except ( gs_handleExceptions ? EXCEPTION_EXECUTE_HANDLER
 794                                    : EXCEPTION_CONTINUE_SEARCH ) {
 795         if ( wxTheApp )
 796         {
 797            // give the user a chance to do something special about this
 798            wxTheApp->OnFatalException();
 799         }
 800
 801         ::ExitProcess(3); // the same exit code as abort()
 802
 803         // NOTREACHED
 804     }
 805 #endif // wxUSE_ON_FATAL_EXCEPTION
 806 }
 807
 808 // restore warning state
 809 #ifdef __VISUALC__
 810     #pragma warning(default: 4715) // not all control paths return a value
 811 #endif // Visual C++
 812
 813 #else /*  _WINDLL  */
 814
 815 //----------------------------------------------------------------------
 816 // Entry point for wxWindows + the App in a DLL
 817 //----------------------------------------------------------------------
 818
 819 int wxEntry(WXHINSTANCE hInstance)
 820 {
 821     wxhInstance = (HINSTANCE) hInstance;
 822     wxEntryStart(0, 0);
 823
 824     // The app may have declared a global application object, but we recommend
 825     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 826     // for delayed, dynamic app object construction.
 827     if (!wxTheApp)
 828     {
 829         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 830                      "No initializer - use IMPLEMENT_APP macro." );
 831
 832         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 833     }
 834
 835     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 836
 837     wxTheApp->argc = 0;
 838     wxTheApp->argv = NULL;
 839
 840     wxEntryInitGui();
 841
 842     wxTheApp->OnInit();
 843
 844     wxWindow *topWindow = wxTheApp->GetTopWindow();
 845     if ( topWindow && topWindow->GetHWND())
 846     {
 847         topWindow->Show(TRUE);
 848     }
 849
 850     return 1;
 851 }
 852 #endif // _WINDLL
 853
 854 //// Static member initialization
 855
 856 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 857
 858 wxApp::wxApp()
 859 {
 860     argc = 0;
 861     argv = NULL;
 862     m_printMode = wxPRINT_WINDOWS;
 863     m_auto3D = TRUE;
 864 }
 865
 866 wxApp::~wxApp()
 867 {
 868     // Delete command-line args
 869     int i;
 870     for (i = 0; i < argc; i++)
 871     {
 872         delete[] argv[i];
 873     }
 874     delete[] argv;
 875 }
 876
 877 bool wxApp::Initialized()
 878 {
 879 #ifndef _WINDLL
 880     if (GetTopWindow())
 881         return TRUE;
 882     else
 883         return FALSE;
 884 #else // Assume initialized if DLL (no way of telling)
 885     return TRUE;
 886 #endif
 887 }
 888
 889 /*
 890  * Get and process a message, returning FALSE if WM_QUIT
 891  * received (and also set the flag telling the app to exit the main loop)
 892  *
 893  */
 894 bool wxApp::DoMessage()
 895 {
 896     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 897     if ( rc == 0 )
 898     {
 899         // got WM_QUIT
 900         m_keepGoing = FALSE;
 901
 902         return FALSE;
 903     }
 904     else if ( rc == -1 )
 905     {
 906         // should never happen, but let's test for it nevertheless
 907         wxLogLastError(wxT("GetMessage"));
 908     }
 909     else
 910     {
 911 #if wxUSE_THREADS
 912         wxASSERT_MSG( wxThread::IsMain(),
 913                       wxT("only the main thread can process Windows messages") );
 914
 915         static bool s_hadGuiLock = TRUE;
 916         static wxMsgArray s_aSavedMessages;
 917
 918         // if a secondary thread owns is doing GUI calls, save all messages for
 919         // later processing - we can't process them right now because it will
 920         // lead to recursive library calls (and we're not reentrant)
 921         if ( !wxGuiOwnedByMainThread() )
 922         {
 923             s_hadGuiLock = FALSE;
 924
 925             // leave out WM_COMMAND messages: too dangerous, sometimes
 926             // the message will be processed twice
 927             if ( !wxIsWaitingForThread() ||
 928                     s_currentMsg.message != WM_COMMAND )
 929             {
 930                 s_aSavedMessages.Add(s_currentMsg);
 931             }
 932
 933             return TRUE;
 934         }
 935         else
 936         {
 937             // have we just regained the GUI lock? if so, post all of the saved
 938             // messages
 939             //
 940             // FIXME of course, it's not _exactly_ the same as processing the
 941             //       messages normally - expect some things to break...
 942             if ( !s_hadGuiLock )
 943             {
 944                 s_hadGuiLock = TRUE;
 945
 946                 size_t count = s_aSavedMessages.Count();
 947                 for ( size_t n = 0; n < count; n++ )
 948                 {
 949                     MSG& msg = s_aSavedMessages[n];
 950
 951                     if ( !ProcessMessage((WXMSG *)&msg) )
 952                     {
 953                         ::TranslateMessage(&msg);
 954                         ::DispatchMessage(&msg);
 955                     }
 956                 }
 957
 958                 s_aSavedMessages.Empty();
 959             }
 960         }
 961 #endif // wxUSE_THREADS
 962
 963         // Process the message
 964         DoMessage((WXMSG *)&s_currentMsg);
 965     }
 966
 967     return TRUE;
 968 }
 969
 970 void wxApp::DoMessage(WXMSG *pMsg)
 971 {
 972     if ( !ProcessMessage(pMsg) )
 973     {
 974         ::TranslateMessage((MSG *)pMsg);
 975         ::DispatchMessage((MSG *)pMsg);
 976     }
 977 }
 978
 979 /*
 980  * Keep trying to process messages until WM_QUIT
 981  * received.
 982  *
 983  * If there are messages to be processed, they will all be
 984  * processed and OnIdle will not be called.
 985  * When there are no more messages, OnIdle is called.
 986  * If OnIdle requests more time,
 987  * it will be repeatedly called so long as there are no pending messages.
 988  * A 'feature' of this is that once OnIdle has decided that no more processing
 989  * is required, then it won't get processing time until further messages
 990  * are processed (it'll sit in DoMessage).
 991  */
 992
 993 int wxApp::MainLoop()
 994 {
 995     m_keepGoing = TRUE;
 996
 997     while ( m_keepGoing )
 998     {
 999 #if wxUSE_THREADS
1000         wxMutexGuiLeaveOrEnter();
1001 #endif // wxUSE_THREADS
1002
1003         while ( !Pending() && ProcessIdle() )
1004             ;
1005
1006         // a message came or no more idle processing to do
1007         DoMessage();
1008     }
1009
1010     return s_currentMsg.wParam;
1011 }
1012
1013 // Returns TRUE if more time is needed.
1014 bool wxApp::ProcessIdle()
1015 {
1016     wxIdleEvent event;
1017     event.SetEventObject(this);
1018     ProcessEvent(event);
1019
1020     return event.MoreRequested();
1021 }
1022
1023 void wxApp::ExitMainLoop()
1024 {
1025     // VZ: why not ::PostQuitMessage()?
1026     m_keepGoing = FALSE;
1027 }
1028
1029 bool wxApp::Pending()
1030 {
1031     return ::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0;
1032 }
1033
1034 void wxApp::Dispatch()
1035 {
1036     DoMessage();
1037 }
1038
1039 /*
1040  * Give all windows a chance to preprocess
1041  * the message. Some may have accelerator tables, or have
1042  * MDI complications.
1043  */
1044
1045 bool wxApp::ProcessMessage(WXMSG *wxmsg)
1046 {
1047     MSG *msg = (MSG *)wxmsg;
1048     HWND hWnd = msg->hwnd;
1049     wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hWnd);
1050
1051 #if wxUSE_TOOLTIPS
1052     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
1053     // popup the tooltip bubbles
1054     if ( wndThis && (msg->message == WM_MOUSEMOVE) )
1055     {
1056         wxToolTip *tt = wndThis->GetToolTip();
1057         if ( tt )
1058         {
1059             tt->RelayEvent(wxmsg);
1060         }
1061     }
1062 #endif // wxUSE_TOOLTIPS
1063
1064     // Try translations first; find the youngest window with
1065     // a translation table.
1066     wxWindow *wnd;
1067
1068     bool pastTopLevelWindow = FALSE;
1069     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
1070     {
1071         if ( !pastTopLevelWindow && wnd->MSWTranslateMessage(wxmsg))
1072             return TRUE;
1073         if ( wnd->MSWProcessMessage(wxmsg) )
1074             return TRUE;
1075
1076         // stop at first top level window, i.e. don't try to process the key
1077         // strokes originating in a dialog using the accelerators of the parent
1078         // frame - this doesn't make much sense
1079         if ( wnd->IsTopLevel() )
1080             pastTopLevelWindow = TRUE;
1081     }
1082
1083     return FALSE;
1084 }
1085
1086 void wxApp::OnIdle(wxIdleEvent& event)
1087 {
1088     static bool s_inOnIdle = FALSE;
1089
1090     // Avoid recursion (via ProcessEvent default case)
1091     if ( s_inOnIdle )
1092         return;
1093
1094     s_inOnIdle = TRUE;
1095
1096     // If there are pending events, we must process them: pending events
1097     // are either events to the threads other than main or events posted
1098     // with wxPostEvent() functions
1099     // GRG: I have moved this here so that all pending events are processed
1100     //   before starting to delete any objects. This behaves better (in
1101     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
1102     //   behaviour. Changed Feb/2000 before 2.1.14
1103     ProcessPendingEvents();
1104
1105     // 'Garbage' collection of windows deleted with Close().
1106     DeletePendingObjects();
1107
1108 #if wxUSE_LOG
1109     // flush the logged messages if any
1110     wxLog::FlushActive();
1111 #endif // wxUSE_LOG
1112
1113     // Send OnIdle events to all windows
1114     if ( SendIdleEvents() )
1115     {
1116         // SendIdleEvents() returns TRUE if at least one window requested more
1117         // idle events
1118         event.RequestMore(TRUE);
1119     }
1120
1121     s_inOnIdle = FALSE;
1122 }
1123
1124 // Send idle event to all top-level windows
1125 bool wxApp::SendIdleEvents()
1126 {
1127     bool needMore = FALSE;
1128
1129     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1130     while (node)
1131     {
1132         wxWindow* win = node->GetData();
1133         if (SendIdleEvents(win))
1134             needMore = TRUE;
1135         node = node->GetNext();
1136     }
1137
1138     return needMore;
1139 }
1140
1141 // Send idle event to window and all subwindows
1142 bool wxApp::SendIdleEvents(wxWindow* win)
1143 {
1144     bool needMore = FALSE;
1145
1146     wxIdleEvent event;
1147     event.SetEventObject(win);
1148     win->GetEventHandler()->ProcessEvent(event);
1149
1150     if (event.MoreRequested())
1151         needMore = TRUE;
1152
1153     wxNode* node = win->GetChildren().First();
1154     while (node)
1155     {
1156         wxWindow* win = (wxWindow*) node->Data();
1157         if (SendIdleEvents(win))
1158             needMore = TRUE;
1159
1160         node = node->Next();
1161     }
1162     return needMore;
1163 }
1164
1165 void wxApp::DeletePendingObjects()
1166 {
1167     wxNode *node = wxPendingDelete.First();
1168     while (node)
1169     {
1170         wxObject *obj = (wxObject *)node->Data();
1171
1172         delete obj;
1173
1174         if (wxPendingDelete.Member(obj))
1175             delete node;
1176
1177         // Deleting one object may have deleted other pending
1178         // objects, so start from beginning of list again.
1179         node = wxPendingDelete.First();
1180     }
1181 }
1182
1183 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1184 {
1185     if (GetTopWindow())
1186         GetTopWindow()->Close(TRUE);
1187 }
1188
1189 // Default behaviour: close the application with prompts. The
1190 // user can veto the close, and therefore the end session.
1191 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1192 {
1193     if (GetTopWindow())
1194     {
1195         if (!GetTopWindow()->Close(!event.CanVeto()))
1196             event.Veto(TRUE);
1197     }
1198 }
1199
1200 /* static */
1201 int wxApp::GetComCtl32Version()
1202 {
1203 #ifdef __WXMICROWIN__
1204     return 0;
1205 #else
1206     // cache the result
1207     static int s_verComCtl32 = -1;
1208
1209     wxCRIT_SECT_DECLARE(csComCtl32);
1210     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1211
1212     if ( s_verComCtl32 == -1 )
1213     {
1214         // initally assume no comctl32.dll at all
1215         s_verComCtl32 = 0;
1216
1217         // do we have it?
1218         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1219
1220         // if so, then we can check for the version
1221         if ( hModuleComCtl32 )
1222         {
1223             // try to use DllGetVersion() if available in _headers_
1224             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1225                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1226                     ::GetProcAddress(hModuleComCtl32, "DllGetVersion");
1227                 if ( pfnDllGetVersion )
1228                 {
1229                     DLLVERSIONINFO dvi;
1230                     dvi.cbSize = sizeof(dvi);
1231
1232                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1233                     if ( FAILED(hr) )
1234                     {
1235                         wxLogApiError(_T("DllGetVersion"), hr);
1236                     }
1237                     else
1238                     {
1239                         // this is incompatible with _WIN32_IE values, but
1240                         // compatible with the other values returned by
1241                         // GetComCtl32Version()
1242                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1243                                             dvi.dwMinorVersion;
1244                     }
1245                 }
1246             #endif
1247                 // DllGetVersion() unavailable either during compile or
1248                 // run-time, try to guess the version otherwise
1249                 if ( !s_verComCtl32 )
1250                 {
1251                     // InitCommonControlsEx is unique to 4.70 and later
1252                     FARPROC theProc = ::GetProcAddress
1253                                         (
1254                                          hModuleComCtl32,
1255                                          "InitCommonControlsEx"
1256                                         );
1257
1258                     if ( !theProc )
1259                     {
1260                         // not found, must be 4.00
1261                         s_verComCtl32 = 400;
1262                     }
1263                     else
1264                     {
1265                         // many symbols appeared in comctl32 4.71, could use
1266                         // any of them except may be DllInstall
1267                         theProc = ::GetProcAddress
1268                                     (
1269                                      hModuleComCtl32,
1270                                      "InitializeFlatSB"
1271                                     );
1272                         if ( !theProc )
1273                         {
1274                             // not found, must be 4.70
1275                             s_verComCtl32 = 470;
1276                         }
1277                         else
1278                         {
1279                             // found, must be 4.71
1280                             s_verComCtl32 = 471;
1281                         }
1282                     }
1283                 }
1284         }
1285     }
1286
1287     return s_verComCtl32;
1288 #endif
1289 }
1290
1291 void wxExit()
1292 {
1293     wxLogError(_("Fatal error: exiting"));
1294
1295     wxApp::CleanUp();
1296     exit(0);
1297 }
1298
1299 // Yield to incoming messages
1300
1301 static bool gs_inYield = FALSE;
1302
1303 bool wxYield()
1304 {
1305     // disable log flushing from here because a call to wxYield() shouldn't
1306     // normally result in message boxes popping up &c
1307     wxLog::Suspend();
1308
1309 #ifdef __WXDEBUG__
1310     if (gs_inYield)
1311         wxFAIL_MSG( wxT("wxYield called recursively" ) );
1312 #endif
1313
1314     gs_inYield = TRUE;
1315
1316     // we don't want to process WM_QUIT from here - it should be processed in
1317     // the main event loop in order to stop it
1318     MSG msg;
1319     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1320             msg.message != WM_QUIT )
1321     {
1322 #if wxUSE_THREADS
1323         wxMutexGuiLeaveOrEnter();
1324 #endif // wxUSE_THREADS
1325
1326         if ( !wxTheApp->DoMessage() )
1327             break;
1328     }
1329
1330     // If they are pending events, we must process them.
1331     if (wxTheApp)
1332         wxTheApp->ProcessPendingEvents();
1333
1334     // let the logs be flashed again
1335     wxLog::Resume();
1336
1337     gs_inYield = FALSE;
1338
1339     return TRUE;
1340 }
1341
1342 // Yield to incoming messages; but fail silently if recursion is detected.
1343 bool wxYieldIfNeeded()
1344 {
1345     if (gs_inYield)
1346         return FALSE;
1347
1348     return wxYield();
1349 }
1350
1351 bool wxHandleFatalExceptions(bool doit)
1352 {
1353 #if wxUSE_ON_FATAL_EXCEPTION
1354     // assume this can only be called from the main thread
1355     gs_handleExceptions = doit;
1356
1357     return TRUE;
1358 #else
1359     wxFAIL_MSG(_T("set wxUSE_ON_FATAL_EXCEPTION to 1 to sue this function"));
1360
1361         (void)doit;
1362     return FALSE;
1363 #endif
1364 }
1365
1366 //-----------------------------------------------------------------------------
1367 // wxWakeUpIdle
1368 //-----------------------------------------------------------------------------
1369
1370 void wxWakeUpIdle()
1371 {
1372     // Send the top window a dummy message so idle handler processing will
1373     // start up again.  Doing it this way ensures that the idle handler
1374     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1375     // the same for the main app thread only)
1376     wxWindow *topWindow = wxTheApp->GetTopWindow();
1377     if ( topWindow )
1378     {
1379         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1380         {
1381             // should never happen
1382             wxLogLastError(wxT("PostMessage(WM_NULL)"));
1383         }
1384     }
1385 }
1386
1387 //-----------------------------------------------------------------------------
1388
1389 wxIcon
1390 wxApp::GetStdIcon(int which) const
1391 {
1392     switch(which)
1393     {
1394         case wxICON_INFORMATION:
1395             return wxIcon("wxICON_INFO");
1396
1397         case wxICON_QUESTION:
1398             return wxIcon("wxICON_QUESTION");
1399
1400         case wxICON_EXCLAMATION:
1401             return wxIcon("wxICON_WARNING");
1402
1403         default:
1404             wxFAIL_MSG(wxT("requested non existent standard icon"));
1405             // still fall through
1406
1407         case wxICON_HAND:
1408             return wxIcon("wxICON_ERROR");
1409     }
1410 }
1411
1412 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1413 // if in a separate file. So include it here to ensure it's linked.
1414 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__) && !defined(WXMAKINGDLL))
1415 #include "main.cpp"
1416 #endif