interface/app.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.h
   3 // Purpose:     interface of wxApp
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxApp
  11     @wxheader{app.h}
  12
  13     The wxApp class represents the application itself. It is used to:
  14
  15     @li set and get application-wide properties;
  16     @li implement the windowing system message or event loop;
  17     @li initiate application processing via wxApp::OnInit;
  18     @li allow default processing of events not handled by other
  19         objects in the application.
  20
  21     You should use the macro IMPLEMENT_APP(appClass) in your application
  22     implementation file to tell wxWidgets how to create an instance of your
  23     application class.
  24
  25     Use DECLARE_APP(appClass) in a header file if you want the wxGetApp function
  26     (which returns a reference to your application object) to be visible to other
  27     files.
  28
  29     @library{wxbase}
  30     @category{appmanagement}
  31
  32     @see @ref overview_app
  33 */
  34 class wxApp : public wxEvtHandler
  35 {
  36 public:
  37     /**
  38         Constructor. Called implicitly with a definition of a wxApp object.
  39     */
  40     wxApp();
  41
  42     /**
  43         Destructor. Will be called implicitly on program exit if the wxApp
  44         object is created on the stack.
  45     */
  46     ~wxApp();
  47
  48     /**
  49         Creates a wxLog class for the application to use for logging errors.
  50         The default implementation returns a new wxLogGui class.
  51
  52         @see wxLog
  53     */
  54     virtual wxLog* CreateLogTarget();
  55
  56     /**
  57         Creates the wxAppTraits object when GetTraits() needs it for the first time.
  58
  59         @see wxAppTraits
  60     */
  61     virtual wxAppTraits* CreateTraits();
  62
  63     /**
  64         Dispatches the next event in the windowing system event queue.
  65         This can be used for programming event loops, e.g.
  66
  67         @code
  68         while (app.Pending())
  69             Dispatch();
  70         @endcode
  71
  72         @see Pending()
  73     */
  74     virtual void Dispatch();
  75
  76     /**
  77         Call this to explicitly exit the main message (event) loop.
  78         You should normally exit the main loop (and the application) by deleting
  79         the top window.
  80     */
  81     virtual void ExitMainLoop();
  82
  83     /**
  84         This function is called before processing any event and allows the application
  85         to preempt the processing of some events.
  86
  87         If this method returns -1 the event is processed normally, otherwise either
  88         @true or @false should be returned and the event processing stops immediately
  89         considering that the event had been already processed (for the former return
  90         value) or that it is not going to be processed at all (for the latter one).
  91     */
  92     int FilterEvent(wxEvent& event);
  93
  94     /**
  95         Returns the user-readable application name.
  96
  97         The difference between this string and the one returned by GetAppName() is that
  98         this one is meant to be shown to the user and so should be used for the window
  99         titles, page headers and so on while the other one should be only used internally,
 100         e.g. for the file names or configuration file keys.
 101         By default, returns the same string as GetAppName().
 102
 103         @wxsince{2.9.0}
 104     */
 105     wxString GetAppDisplayName() const;
 106
 107     /**
 108         Returns the application name.
 109
 110         @remarks wxWidgets sets this to a reasonable default before calling
 111                  OnInit(), but the application can reset it at will.
 112
 113         @see GetAppDisplayName()
 114     */
 115     wxString GetAppName() const;
 116
 117     /**
 118         Gets the class name of the application. The class name may be used in a
 119         platform specific manner to refer to the application.
 120
 121         @see SetClassName()
 122     */
 123     wxString GetClassName() const;
 124
 125     /**
 126         Returns @true if the application will exit when the top-level window is
 127         deleted, @false otherwise.
 128
 129         @see SetExitOnFrameDelete(), @ref overview_app_shutdown
 130     */
 131     bool GetExitOnFrameDelete() const;
 132
 133     /**
 134         Returns the one and only global application object.
 135         Usually ::wxTheApp is usead instead.
 136
 137         @see SetInstance()
 138     */
 139     static wxAppConsole* GetInstance();
 140
 141     /**
 142         Returns a pointer to the top window.
 143
 144         @remarks If the top window hasn't been set using SetTopWindow(),
 145                  this function will find the first top-level window
 146                  (frame or dialog) and return that.
 147
 148         @see SetTopWindow()
 149     */
 150     virtual wxWindow* GetTopWindow() const;
 151
 152     /**
 153         Returns a pointer to the wxAppTraits object for the application.
 154         If you want to customize the wxAppTraits object, you must override the
 155         CreateTraits() function.
 156     */
 157     wxAppTraits* GetTraits();
 158
 159     /**
 160         Returns @true if the application will use the best visual on systems that support
 161         different visuals, @false otherwise.
 162
 163         @see SetUseBestVisual()
 164     */
 165     bool GetUseBestVisual() const;
 166
 167     /**
 168         Returns the user-readable vendor name. The difference between this string
 169         and the one returned by GetVendorName() is that this one is meant to be shown
 170         to the user and so should be used for the window titles, page headers and so on
 171         while the other one should be only used internally, e.g. for the file names or
 172         configuration file keys.
 173
 174         By default, returns the same string as GetVendorName().
 175
 176         @wxsince{2.9.0}
 177     */
 178     wxString GetVendorDisplayName() const;
 179
 180     /**
 181         Returns the application's vendor name.
 182     */
 183     wxString GetVendorName() const;
 184
 185     /**
 186         This function simply invokes the given method @a func of the specified
 187         event handler @a handler with the @a event as parameter. It exists solely
 188         to allow to catch the C++ exceptions which could be thrown by all event
 189         handlers in the application in one place: if you want to do this, override
 190         this function in your wxApp-derived class and add try/catch clause(s) to it.
 191     */
 192     virtual void HandleEvent(wxEvtHandler handler,
 193                              wxEventFunction func,
 194                              wxEvent& event) const;
 195
 196     /**
 197         Returns @true if the application is active, i.e. if one of its windows is
 198         currently in the foreground.
 199
 200         If this function returns @false and you need to attract users attention to
 201         the application, you may use wxTopLevelWindow::RequestUserAttention to do it.
 202     */
 203     bool IsActive() const;
 204
 205     /**
 206         Returns @true if the main event loop is currently running, i.e. if the
 207         application is inside OnRun().
 208
 209         This can be useful to test whether events can be dispatched. For example,
 210         if this function returns @false, non-blocking sockets cannot be used because
 211         the events from them would never be processed.
 212     */
 213     static bool IsMainLoopRunning();
 214
 215     /**
 216         Mac specific. Called in response of an "open-application" Apple event.
 217         Override this to create a new document in your app.
 218     */
 219     void MacNewFile();
 220
 221     /**
 222         Mac specific. Called in response of an "open-document" Apple event.
 223
 224         You need to override this method in order to open a document file after the
 225         user double clicked on it or if the document file was dropped on either the
 226         running application or the application icon in Finder.
 227     */
 228     void MacOpenFile(const wxString& fileName);
 229
 230     /**
 231         Mac specific. Called in response of a "get-url" Apple event.
 232     */
 233     void MacOpenURL(const wxString& url);
 234
 235     /**
 236         Mac specific. Called in response of a "print-document" Apple event.
 237     */
 238     void MacPrintFile(const wxString& fileName);
 239
 240     /**
 241         Mac specific. Called in response of a "reopen-application" Apple event.
 242     */
 243     void MacReopenApp();
 244
 245     /**
 246         Called by wxWidgets on creation of the application. Override this if you wish
 247         to provide your own (environment-dependent) main loop.
 248
 249         @returns Returns 0 under X, and the wParam of the WM_QUIT message under
 250                  Windows.
 251     */
 252     virtual int MainLoop();
 253
 254     /**
 255         This function is called when an assert failure occurs, i.e. the condition
 256         specified in wxASSERT() macro evaluated to @false.
 257
 258         It is only called in debug mode (when @c __WXDEBUG__ is defined) as
 259         asserts are not left in the release code at all.
 260         The base class version shows the default assert failure dialog box proposing to
 261         the user to stop the program, continue or ignore all subsequent asserts.
 262
 263         @param file
 264             the name of the source file where the assert occurred
 265         @param line
 266             the line number in this file where the assert occurred
 267         @param func
 268             the name of the function where the assert occurred, may be
 269             empty if the compiler doesn't support C99 __FUNCTION__
 270         @param cond
 271             the condition of the failed assert in text form
 272         @param msg
 273             the message specified as argument to wxASSERT_MSG or wxFAIL_MSG, will
 274             be @NULL if just wxASSERT or wxFAIL was used
 275     */
 276     void OnAssertFailure(const wxChar file, int line,
 277                          const wxChar func,
 278                          const wxChar cond,
 279                          const wxChar msg);
 280
 281     /**
 282         Called when command line parsing fails (i.e. an incorrect command line option
 283         was specified by the user). The default behaviour is to show the program usage
 284         text and abort the program.
 285
 286         Return @true to continue normal execution or @false to return
 287         @false from OnInit() thus terminating the program.
 288
 289         @see OnInitCmdLine()
 290     */
 291     bool OnCmdLineError(wxCmdLineParser& parser);
 292
 293     /**
 294         Called when the help option (@c --help) was specified on the command line.
 295         The default behaviour is to show the program usage text and abort the program.
 296
 297         Return @true to continue normal execution or @false to return
 298         @false from OnInit() thus terminating the program.
 299
 300         @see OnInitCmdLine()
 301     */
 302     bool OnCmdLineHelp(wxCmdLineParser& parser);
 303
 304     /**
 305         Called after the command line had been successfully parsed. You may override
 306         this method to test for the values of the various parameters which could be
 307         set from the command line.
 308
 309         Don't forget to call the base class version unless you want to suppress
 310         processing of the standard command line options.
 311         Return @true to continue normal execution or @false to return @false from
 312         OnInit() thus terminating the program.
 313
 314         @see OnInitCmdLine()
 315     */
 316     bool OnCmdLineParsed(wxCmdLineParser& parser);
 317
 318     /**
 319         This function is called if an unhandled exception occurs inside the main
 320         application event loop. It can return @true to ignore the exception and to
 321         continue running the loop or @false to exit the loop and terminate the
 322         program. In the latter case it can also use C++ @c throw keyword to
 323         rethrow the current exception.
 324
 325         The default behaviour of this function is the latter in all ports except under
 326         Windows where a dialog is shown to the user which allows him to choose between
 327         the different options. You may override this function in your class to do
 328         something more appropriate.
 329
 330         Finally note that if the exception is rethrown from here, it can be caught in
 331         OnUnhandledException().
 332     */
 333     virtual bool OnExceptionInMainLoop();
 334
 335     /**
 336         Override this member function for any processing which needs to be
 337         done as the application is about to exit. OnExit is called after
 338         destroying all application windows and controls, but before
 339         wxWidgets cleanup. Note that it is not called at all if
 340         OnInit() failed.
 341
 342         The return value of this function is currently ignored, return the same
 343         value as returned by the base class method if you override it.
 344     */
 345     virtual int OnExit();
 346
 347     /**
 348         This function may be called if something fatal happens: an unhandled
 349         exception under Win32 or a a fatal signal under Unix, for example. However,
 350         this will not happen by default: you have to explicitly call
 351         wxHandleFatalExceptions() to enable this.
 352
 353         Generally speaking, this function should only show a message to the user and
 354         return. You may attempt to save unsaved data but this is not guaranteed to
 355         work and, in fact, probably won't.
 356
 357         @see wxHandleFatalExceptions()
 358     */
 359     void OnFatalException();
 360
 361     /**
 362         This must be provided by the application, and will usually create the
 363         application's main window, optionally calling SetTopWindow().
 364
 365         You may use OnExit() to clean up anything initialized here, provided
 366         that the function returns @true.
 367
 368         Notice that if you want to to use the command line processing provided by
 369         wxWidgets you have to call the base class version in the derived class
 370         OnInit().
 371
 372         Return @true to continue processing, @false to exit the application
 373         immediately.
 374     */
 375     bool OnInit();
 376
 377     /**
 378         Called from OnInit() and may be used to initialize the parser with the
 379         command line options for this application. The base class versions adds
 380         support for a few standard options only.
 381     */
 382     void OnInitCmdLine(wxCmdLineParser& parser);
 383
 384     /**
 385         This virtual function is where the execution of a program written in wxWidgets
 386         starts. The default implementation just enters the main loop and starts
 387         handling the events until it terminates, either because ExitMainLoop() has
 388         been explicitly called or because the last frame has been deleted and
 389         GetExitOnFrameDelete() flag is @true (this is the default).
 390
 391         The return value of this function becomes the exit code of the program, so it
 392         should return 0 in case of successful termination.
 393     */
 394     virtual int OnRun();
 395
 396     /**
 397         This function is called when an unhandled C++ exception occurs inside
 398         OnRun() (the exceptions which occur during the program startup and shutdown
 399         might not be caught at all). Notice that by now the main event loop has been
 400         terminated and the program will exit, if you want to prevent this from happening
 401         (i.e. continue running after catching an exception) you need to override
 402         OnExceptionInMainLoop().
 403
 404         The default implementation shows information about the exception in debug build
 405         but does nothing in the release build.
 406     */
 407     virtual void OnUnhandledException();
 408
 409     /**
 410         Returns @true if unprocessed events are in the window system event queue.
 411
 412         @see Dispatch()
 413     */
 414     virtual bool Pending();
 415
 416     /**
 417         Windows-only function for processing a message. This function is called
 418         from the main message loop, checking for windows that may wish to process it.
 419
 420         The function returns @true if the message was processed, @false otherwise.
 421         If you use wxWidgets with another class library with its own message loop,
 422         you should make sure that this function is called to allow wxWidgets to
 423         receive messages. For example, to allow co-existence with the Microsoft
 424         Foundation Classes, override the PreTranslateMessage function:
 425
 426         @code
 427         // Provide wxWidgets message loop compatibility
 428         BOOL CTheApp::PreTranslateMessage(MSG *msg)
 429         {
 430             if (wxTheApp && wxTheApp->ProcessMessage((WXMSW *)msg))
 431                 return true;
 432             else
 433                 return CWinApp::PreTranslateMessage(msg);
 434         }
 435         @endcode
 436     */
 437     bool ProcessMessage(WXMSG* msg);
 438
 439     /**
 440         Sends idle events to a window and its children.
 441         Please note that this function is internal to wxWidgets and shouldn't be used
 442         by user code.
 443
 444         @remarks These functions poll the top-level windows, and their children,
 445                  for idle event processing. If @true is returned, more OnIdle
 446                  processing is requested by one or more window.
 447
 448         @see wxIdleEvent
 449     */
 450     bool SendIdleEvents(wxWindow* win, wxIdleEvent& event);
 451
 452     /**
 453         Set the application name to be used in the user-visible places such as window
 454         titles. See GetAppDisplayName() for more about the differences between the
 455         display name and name.
 456     */
 457     void SetAppDisplayName(const wxString& name);
 458
 459     /**
 460         Sets the name of the application. This name should be used for file names,
 461         configuration file entries and other internal strings. For the user-visible
 462         strings, such as the window titles, the application display name set by
 463         SetAppDisplayName() is used instead.
 464
 465         By default the application name is set to the name of its executable file.
 466
 467         @see GetAppName()
 468     */
 469     void SetAppName(const wxString& name);
 470
 471     /**
 472         Sets the class name of the application. This may be used in a platform specific
 473         manner to refer to the application.
 474
 475         @see GetClassName()
 476     */
 477     void SetClassName(const wxString& name);
 478
 479     /**
 480         Allows the programmer to specify whether the application will exit when the
 481         top-level frame is deleted.
 482
 483         @param flag
 484             If @true (the default), the application will exit when the top-level frame
 485             is deleted. If @false, the application will continue to run.
 486
 487         @see GetExitOnFrameDelete(), @ref overview_app_shutdown
 488     */
 489     void SetExitOnFrameDelete(bool flag);
 490
 491     /**
 492         Allows external code to modify global ::wxTheApp, but you should really
 493         know what you're doing if you call it.
 494
 495         @param app
 496             Replacement for the global application object.
 497
 498         @see GetInstance()
 499     */
 500     static void SetInstance(wxAppConsole* app);
 501
 502     /**
 503         Allows runtime switching of the UI environment theme.
 504
 505         Currently implemented for wxGTK2-only.
 506         Return @true if theme was successfully changed.
 507
 508         @param theme
 509             The name of the new theme or an absolute path to a gtkrc-theme-file
 510     */
 511     bool SetNativeTheme(const wxString& theme);
 512
 513     /**
 514         Sets the 'top' window. You can call this from within OnInit() to let wxWidgets
 515         know which is the main window. You don't have to set the top window;
 516         it is only a convenience so that (for example) certain dialogs without parents
 517         can use a specific window as the top window. If no top window is specified by the
 518         application, wxWidgets just uses the first frame or dialog in its top-level window
 519         list, when it needs to use the top window.
 520
 521         @param window
 522             The new top window.
 523
 524         @see GetTopWindow(), OnInit()
 525     */
 526     void SetTopWindow(wxWindow* window);
 527
 528     /**
 529         Allows the programmer to specify whether the application will use the best
 530         visual on systems that support several visual on the same display. This is typically
 531         the case under Solaris and IRIX, where the default visual is only 8-bit whereas
 532         certain applications are supposed to run in TrueColour mode.
 533
 534         Note that this function has to be called in the constructor of the wxApp
 535         instance and won't have any effect when called later on.
 536         This function currently only has effect under GTK.
 537
 538         @param flag
 539             If @true, the app will use the best visual.
 540         @param forceTrueColour
 541             If @true then the application will try to force using a TrueColour
 542             visual and abort the app if none is found.
 543     */
 544     void SetUseBestVisual(bool flag, bool forceTrueColour = false);
 545
 546     /**
 547         Set the vendor name to be used in the user-visible places.
 548         See GetVendorDisplayName() for more about the differences between the
 549         display name and name.
 550     */
 551     void SetVendorDisplayName(const wxString& name);
 552
 553     /**
 554         Sets the name of application's vendor. The name will be used
 555         in registry access. A default name is set by wxWidgets.
 556
 557         @see GetVendorName()
 558     */
 559     void SetVendorName(const wxString& name);
 560
 561     /**
 562         Yields control to pending messages in the windowing system.
 563
 564         This can be useful, for example, when a time-consuming process writes to a
 565         text window. Without an occasional yield, the text window will not be updated
 566         properly, and on systems with cooperative multitasking, such as Windows 3.1
 567         other processes will not respond.
 568
 569         Caution should be exercised, however, since yielding may allow the
 570         user to perform actions which are not compatible with the current task.
 571         Disabling menu items or whole menus during processing can avoid unwanted
 572         reentrance of code: see ::wxSafeYield for a better function.
 573
 574         Note that Yield() will not flush the message logs. This is intentional as
 575         calling Yield() is usually done to quickly update the screen and popping up
 576         a message box dialog may be undesirable. If you do wish to flush the log
 577         messages immediately (otherwise it will be done during the next idle loop
 578         iteration), call wxLog::FlushActive.
 579
 580         Calling Yield() recursively is normally an error and an assert failure is
 581         raised in debug build if such situation is detected. However if the
 582         @a onlyIfNeeded parameter is @true, the method will just silently
 583         return @false instead.
 584     */
 585     bool Yield(bool onlyIfNeeded = false);
 586
 587     /**
 588         Number of command line arguments (after environment-specific processing).
 589     */
 590     int argc;
 591
 592     /**
 593         Command line arguments (after environment-specific processing).
 594
 595         Under Windows and Linux/Unix, you should parse the command line
 596         arguments and check for files to be opened when starting your
 597         application. Under OS X, you need to override MacOpenFile()
 598         since command line arguments are used differently there.
 599
 600         You may use the wxCmdLineParser to parse command line arguments.
 601     */
 602     wxChar** argv;
 603 };
 604
 605
 606
 607 // ============================================================================
 608 // Global functions/macros
 609 // ============================================================================
 610
 611 /**
 612     The global pointer to the singleton wxApp object.
 613
 614     @see wxApp::GetInstance()
 615 */
 616 wxApp *wxTheApp;
 617
 618
 619
 620 /** @ingroup group_funcmacro_rtti */
 621 //@{
 622
 623 /**
 624     This is used in headers to create a forward declaration of the wxGetApp()
 625     function implemented by IMPLEMENT_APP().
 626
 627     It creates the declaration @a className wxGetApp(void).
 628
 629     @header{wx/app.h}
 630
 631     Example:
 632
 633     @code
 634     DECLARE_APP(MyApp)
 635     @endcode
 636 */
 637 #define DECLARE_APP( className )
 638
 639 /**
 640     This is used in the application class implementation file to make the
 641     application class known to wxWidgets for dynamic construction.
 642
 643     @header{wx/app.h}
 644
 645     Example:
 646
 647     @code
 648     IMPLEMENT_APP(MyApp)
 649     @endcode
 650
 651     @see DECLARE_APP().
 652 */
 653 #define IMPLEMENT_APP( className )
 654
 655 //@}
 656
 657
 658
 659 /** @ingroup group_funcmacro_appinitterm */
 660 //@{
 661
 662 /**
 663     This function doesn't exist in wxWidgets but it is created by using
 664     the IMPLEMENT_APP() macro.
 665
 666     Thus, before using it anywhere but in the same module where this macro is
 667     used, you must make it available using DECLARE_APP().
 668
 669     The advantage of using this function compared to directly using the global
 670     wxTheApp pointer is that the latter is of type wxApp* and so wouldn't
 671     allow you to access the functions specific to your application class but not
 672     present in wxApp while wxGetApp() returns the object of the right type.
 673 */
 674 wxAppDerivedClass wxGetApp();
 675
 676 /**
 677     If @a doIt is @true, the fatal exceptions (also known as general protection
 678     faults under Windows or segmentation violations in the Unix world) will be
 679     caught and passed to wxApp::OnFatalException.
 680
 681     By default, i.e. before this function is called, they will be handled in the
 682     normal way which usually just means that the application will be terminated.
 683     Calling wxHandleFatalExceptions() with @a doIt equal to @false will restore
 684     this default behaviour.
 685
 686     Notice that this function is only available if @c wxUSE_ON_FATAL_EXCEPTION is 1
 687     and under Windows platform this requires a compiler with support for SEH
 688     (structured exception handling) which currently means only Microsoft Visual C++
 689     or a recent Borland C++ version.
 690 */
 691 bool wxHandleFatalExceptions(bool doIt = true);
 692
 693
 694 /**
 695     This function is used in wxBase only and only if you don't create
 696     wxApp object at all. In this case you must call it from your
 697     @c main() function before calling any other wxWidgets functions.
 698
 699     If the function returns @false the initialization could not be performed,
 700     in this case the library cannot be used and wxUninitialize() shouldn't be
 701     called neither.
 702
 703     This function may be called several times but wxUninitialize() must be
 704     called for each successful call to this function.
 705 */
 706 bool wxInitialize();
 707
 708 /**
 709     This function is for use in console (wxBase) programs only. It must be called
 710     once for each previous successful call to wxInitialize().
 711 */
 712 void wxUninitialize();
 713
 714 /**
 715     Calls wxApp::Yield.
 716
 717     @deprecated
 718     This function is kept only for backwards compatibility. Please use
 719     the wxApp::Yield method instead in any new code.
 720 */
 721 bool wxYield();
 722
 723 /**
 724     This function is similar to wxYield, except that it disables the user input to
 725     all program windows before calling wxYield and re-enables it again
 726     afterwards. If @a win is not @NULL, this window will remain enabled,
 727     allowing the implementation of some limited user interaction.
 728     Returns the result of the call to ::wxYield.
 729 */
 730 bool wxSafeYield(wxWindow* win = NULL, bool onlyIfNeeded = false);
 731
 732 /**
 733     This function initializes wxWidgets in a platform-dependent way. Use this if you
 734     are not using the default wxWidgets entry code (e.g. main or WinMain).
 735
 736     For example, you can initialize wxWidgets from an Microsoft Foundation Classes
 737     (MFC) application using this function.
 738
 739     @note This overload of wxEntry is available under all platforms.
 740
 741     @see wxEntryStart()
 742 */
 743 int wxEntry(int& argc, wxChar** argv);
 744
 745 /**
 746     See wxEntry(int&,wxChar**) for more info about this function.
 747
 748     Notice that under Windows CE platform, and only there, the type of @a pCmdLine
 749     is @c wchar_t *, otherwise it is @c char *, even in Unicode build.
 750
 751     @remarks To clean up wxWidgets, call wxApp::OnExit followed by the static
 752              function wxApp::CleanUp. For example, if exiting from an MFC application
 753              that also uses wxWidgets:
 754              @code
 755              int CTheApp::ExitInstance()
 756              {
 757                 // OnExit isn't called by CleanUp so must be called explicitly.
 758                 wxTheApp->OnExit();
 759                 wxApp::CleanUp();
 760
 761                 return CWinApp::ExitInstance();
 762              }
 763              @endcode
 764
 765 */
 766 int wxEntry(HINSTANCE hInstance,
 767             HINSTANCE hPrevInstance = NULL,
 768             char* pCmdLine = NULL,
 769             int nCmdShow = SW_SHOWNORMAL);
 770
 771 //@}
 772
 773
 774
 775 /** @ingroup group_funcmacro_procctrl */
 776 //@{
 777
 778 /**
 779     Exits application after calling wxApp::OnExit.
 780
 781     Should only be used in an emergency: normally the top-level frame
 782     should be deleted (after deleting all other frames) to terminate the
 783     application. See wxCloseEvent and wxApp.
 784 */
 785 void wxExit();
 786
 787 //@}
 788