call OnInit() from all samples to allow using standard command line options with all of them (patch 1623971)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44354 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/access/accesstest.cpp

@@ -163,6 +163,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_ACCESSIBILITY
     // Note: JAWS for Windows will only speak the context-sensitive
     // help if you use this help provider:

samples/animate/anitest.cpp

@@ -90,6 +90,9 @@ END_EVENT_TABLE()
 // Initialise this in OnInit, not statically
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
 
     MyFrame* frame = new MyFrame((wxFrame *)NULL, wxID_ANY, _T("Animation Demo"),

samples/artprov/arttest.cpp

@@ -96,6 +96,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("wxArtProvider sample"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/aui/auidemo.cpp

@@ -548,6 +548,9 @@ END_EVENT_TABLE()
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxFrame* frame = new MyFrame(NULL,
                                  wxID_ANY,
                                  wxT("wxAUI Sample Application"),

samples/calendar/calendar.cpp

@@ -266,6 +266,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("Calendar wxWidgets sample")
 #ifndef __WXWINCE__

samples/caret/caret.cpp

@@ -182,6 +182,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create and show the main application window
     MyFrame *frame = new MyFrame(_T("Caret wxWidgets sample"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/checklst/checklst.cpp

@@ -151,6 +151,9 @@ IMPLEMENT_APP(CheckListBoxApp)
 // init our app: create windows
 bool CheckListBoxApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     CheckListBoxFrame *pFrame = new CheckListBoxFrame
                                     (
                                      NULL,

samples/collpane/collpane.cpp

@@ -126,6 +126,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create and show the main frame
     MyFrame* frame = new MyFrame;
 

samples/combo/combo.cpp

@@ -154,6 +154,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("wxComboCtrl and wxOwnerDrawnComboBox Sample"));
 

samples/config/conftest.cpp

@@ -85,6 +85,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   // we're using wxConfig's "create-on-demand" feature: it will create the
   // config object when it's used for the first time. It has a number of
   // advantages compared with explicitly creating our wxConfig:

samples/dataview/dataview.cpp

@@ -365,6 +365,9 @@ IMPLEMENT_APP  (MyApp)
 
 bool MyApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     MyFrame *frame = new MyFrame(NULL, wxT("wxDataViewCtrl feature test"), 10, 10, 800, 340);
     frame->Show(true);
 

samples/db/dbtest.cpp

@@ -635,6 +635,9 @@ void CheckSupportForAllDataTypes(wxDb *pDb)
 
 bool DatabaseDemoApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     DbConnectInf    = NULL;
     Contact         = NULL;
 

samples/dialogs/dialogs.cpp

@@ -238,6 +238,9 @@ MyCanvas *myCanvas = (MyCanvas *) NULL;
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_IMAGE
     wxInitAllImageHandlers();
 #endif

samples/dialup/nettest.cpp

@@ -150,6 +150,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("Dial-up wxWidgets demo"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/display/display.cpp

@@ -167,6 +167,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #ifdef __WXMSW__
     if ( argc == 2 && !wxStricmp(argv[1],  _T("/dx")) )
     {

samples/dnd/dnd.cpp

@@ -883,6 +883,9 @@ END_EVENT_TABLE()
 // `Main program' equivalent, creating windows and returning main app frame
 bool DnDApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_DRAG_AND_DROP || wxUSE_CLIPBOARD
     // switch on trace messages
 #if wxUSE_LOG

samples/docview/docview.cpp

@@ -55,6 +55,9 @@ MyApp::MyApp(void)
 
 bool MyApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     //// Find out if we're:
     ////  multiple window: multiple windows, each view in a separate frame
     ////  single window:   one view (within the main frame) and one document at a time, as in Windows Write.

samples/dragimag/dragimag.cpp

@@ -368,6 +368,9 @@ MyApp::MyApp()
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_LIBPNG
     wxImage::AddHandler( new wxPNGHandler );
 #endif

samples/drawing/drawing.cpp

@@ -353,6 +353,9 @@ bool MyApp::LoadImages()
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("Drawing sample"),
                                  wxPoint(50, 50), wxSize(550, 340));

samples/dynamic/dynamic.cpp

@@ -66,6 +66,9 @@ IMPLEMENT_APP  (MyApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame *frame = new MyFrame(NULL, _T("Dynamic wxWidgets App"), 50, 50, 450, 340);
 

samples/erase/erase.cpp

@@ -117,6 +117,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     MyFrame *frame = new MyFrame;
 
     frame->Show(true);

samples/event/event.cpp

@@ -200,6 +200,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("Event wxWidgets Sample"),
                                  wxPoint(50, 50), wxSize(600, 340));

samples/except/except.cpp

@@ -238,6 +238,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame();
 

samples/exec/exec.cpp

@@ -386,6 +386,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("Exec wxWidgets sample"),
                                  wxDefaultPosition, wxSize(500, 140));

samples/font/font.cpp

@@ -234,6 +234,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(wxT("Font wxWidgets demo"),
                                  wxPoint(50, 50), wxSize(600, 400));

samples/help/demo.cpp

@@ -287,6 +287,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create a simple help provider to make SetHelpText() do something.
     // Note that this must be set before any SetHelpText() calls are made.
 #if USE_SIMPLE_HELP_PROVIDER

samples/html/about/about.cpp

@@ -85,6 +85,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // we use a PNG image in our HTML page
     wxImage::AddHandler(new wxPNGHandler);
 

samples/html/help/help.cpp

@@ -102,6 +102,9 @@
    // `Main program' equivalent: the program execution "starts" here
    bool MyApp::OnInit()
    {
+       if ( !wxApp::OnInit() )
+           return false;
+
       wxInitAllImageHandlers();
 #if wxUSE_STREAMS && wxUSE_ZIPSTREAM && wxUSE_ZLIB
       wxFileSystem::AddHandler(new wxZipFSHandler);

samples/html/helpview/helpview.cpp

@@ -53,6 +53,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #ifdef __WXMOTIF__
     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 #endif

samples/html/htmlctrl/htmlctrl.cpp

@@ -125,6 +125,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("wxWebKit Sample"));
 

samples/html/printing/printing.cpp

@@ -128,6 +128,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_LIBPNG
     wxImage::AddHandler(new wxPNGHandler);
 #endif

samples/html/test/test.cpp

@@ -154,6 +154,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_SYSTEM_OPTIONS
     wxSystemOptions::SetOption(wxT("no-maskblt"), 1);
 #endif

samples/html/virtual/virtual.cpp

@@ -155,6 +155,9 @@ wxFSFile* MyVFS::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
    // `Main program' equivalent: the program execution "starts" here
    bool MyApp::OnInit()
    {
+     if ( !wxApp::OnInit() )
+         return false;
+
     // Create the main application window
       MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"),
          wxDefaultPosition, wxSize(640, 480));

samples/html/widget/widget.cpp

@@ -156,6 +156,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame( _("wxHtmlWindow testing application"),
         wxDefaultPosition, wxSize(640, 480) );

samples/html/zip/zip.cpp

@@ -97,6 +97,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_LIBPNG
     wxImage::AddHandler(new wxPNGHandler);
 #endif

samples/image/image.cpp

@@ -1168,6 +1168,9 @@ void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxInitAllImageHandlers();
 
     wxFrame *frame = new MyFrame();

samples/internat/internat.cpp

@@ -166,6 +166,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     long lng = -1;
 
     if ( argc == 2 )

samples/ipc/client.cpp

@@ -76,6 +76,9 @@ END_EVENT_TABLE()
 // main frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     m_frame = new MyFrame(NULL, _T("Client"));
     m_frame->Show(true);

samples/ipc/server.cpp

@@ -66,6 +66,9 @@ END_EVENT_TABLE()
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     m_frame = new MyFrame(NULL, _T("Server"));
     m_frame->Show(true);

samples/joytest/joytest.cpp

@@ -43,6 +43,9 @@ int nButtons = 0;
 // Initialise this in OnInit, not statically
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxJoystick stick(wxJOYSTICK1);
     if (!stick.IsOk())
     {

samples/keyboard/keyboard.cpp

@@ -240,6 +240,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("Keyboard wxWidgets App"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/layout/layout.cpp

@@ -41,6 +41,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   // Create the main frame window
   MyFrame *frame = new MyFrame;
 

samples/listbox/lboxtest.cpp

@@ -322,6 +322,9 @@ END_EVENT_TABLE()
 
 bool LboxTestApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxFrame *frame = new LboxTestFrame(_T("wxListBox sample"));
     frame->Show();
 

samples/listctrl/listtest.cpp

@@ -153,6 +153,9 @@ int wxCALLBACK MyCompareFunction(long item1, long item2, long WXUNUSED(sortData)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   // Create the main frame window
   MyFrame *frame = new MyFrame(wxT("wxListCtrl Test"));
 

samples/mdi/mdi.cpp

@@ -112,6 +112,9 @@ END_EVENT_TABLE()
 // Initialise this in OnInit, not statically
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
 
     frame = new MyFrame((wxFrame *)NULL, wxID_ANY, _T("MDI Demo"),

samples/mediaplayer/mediaplayer.cpp

@@ -409,6 +409,9 @@ IMPLEMENT_APP(wxMediaPlayerApp)
 // ----------------------------------------------------------------------------
 bool wxMediaPlayerApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // SetAppName() lets wxConfig and others know where to write
     SetAppName(wxT("wxMediaPlayer"));
 

samples/memcheck/memcheck.cpp

@@ -56,6 +56,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit(void)
 {
+  if ( !wxApp::OnInit() )
+	  return false;
+
   // Create the main frame window
   MyFrame *frame = new MyFrame((wxFrame *) NULL);
 

samples/menu/menu.cpp

@@ -344,6 +344,9 @@ IMPLEMENT_APP(MyApp)
 // main frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame* frame = new MyFrame;
 

samples/mfc/mfctest.cpp

@@ -232,6 +232,9 @@ BOOL CTheApp::OnIdle(LONG WXUNUSED(lCount))
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if !START_WITH_MFC_WINDOW
     // as we're not inside wxWidgets main loop, the default logic doesn't work
     // in our case and we need to do this explicitly

samples/minifram/minifram.cpp

@@ -57,6 +57,9 @@ wxButton      *button     = (wxButton*) NULL;
 // main frame
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+    return false;
+
   // Create the main frame window
   main_frame = new MyMainFrame((wxFrame *) NULL, wxID_ANY, _T("wxFrame sample"),
      wxPoint(100, 100), wxSize(300, 200));

samples/mobile/styles/styles.cpp

@@ -86,6 +86,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxInitAllImageHandlers();
 
     SetVendorName(_T("Free world"));

samples/mobile/wxedit/wxedit.cpp

@@ -404,6 +404,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     SetVendorName(_T("Free world"));
     SetAppName(_T("wxEdit"));
 

samples/multimon/multimon_test.cpp

@@ -22,6 +22,9 @@ IMPLEMENT_APP(TestApp)
 
 bool TestApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   bool is_use_display =
                         #if wxUSE_DISPLAY
                         true

samples/nativdlg/nativdlg.cpp

@@ -32,6 +32,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit(void)
 {
+  if ( !wxApp::OnInit() )
+    return false;
+
   // Create the main frame window
   MyFrame   *frame = new MyFrame(NULL, wxID_ANY, _T("wxWidgets Native Dialog Sample"), wxPoint(0, 0), wxSize(300, 250));
 

samples/notebook/notebook.cpp

@@ -34,6 +34,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_HELP
     wxHelpProvider::Set( new wxSimpleHelpProvider );
 #endif

samples/oleauto/oleauto.cpp

@@ -125,6 +125,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("OleAuto wxWidgets App"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/opengl/cube/cube.cpp

@@ -521,6 +521,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     (void) MyFrame::Create(NULL);
 

samples/opengl/isosurf/isosurf.cpp

@@ -246,6 +246,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     Args(argc, argv);
 
     // Create the main frame window

samples/opengl/penguin/penguin.cpp

@@ -40,6 +40,9 @@
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame *frame = new MyFrame(NULL, wxT("wxWidgets Penguin Sample"),
         wxDefaultPosition, wxDefaultSize);

samples/ownerdrw/ownerdrw.cpp

@@ -88,6 +88,9 @@ IMPLEMENT_APP(OwnerDrawnApp)
 // init our app: create windows
 bool OwnerDrawnApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     OwnerDrawnFrame *pFrame
         = new OwnerDrawnFrame(NULL, _T("wxWidgets Ownerdraw Sample"),
                               50, 50, 450, 340);

samples/png/pngdemo.cpp

@@ -27,6 +27,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit(void)
 {
+  if ( !wxApp::OnInit() )
+    return false;
+
   wxImage::AddHandler(new wxPNGHandler);
 
   // Create the main frame window

samples/popup/popup.cpp

@@ -289,6 +289,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     m_frame = new MyFrame(_T("Popup wxWidgets App"));
 

samples/printing/printing.cpp

@@ -77,6 +77,9 @@ bool WritePageHeader(wxPrintout *printout, wxDC *dc, const wxChar *text, float m
 
 bool MyApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxInitAllImageHandlers();
 
     m_testFont.Create(10, wxSWISS, wxNORMAL, wxNORMAL);

samples/propsize/propsize.cpp

@@ -114,6 +114,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main application window
     MyFrame *frame = new MyFrame(_T("Proportional resize"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/regtest/regtest.cpp

@@ -318,6 +318,9 @@ IMPLEMENT_APP(RegApp)
 // `Main program' equivalent, creating windows and returning main app frame
 bool RegApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main frame window and show it
     RegFrame *frame = new RegFrame(NULL, _T("wxRegTest"), 50, 50, 600, 350);
     frame->Show(true);

samples/render/render.cpp

@@ -201,6 +201,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     new MyFrame;
 

samples/richtext/richtext.cpp

@@ -333,6 +333,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_HELP
     wxHelpProvider::Set(new wxSimpleHelpProvider);
 #endif

samples/rotate/rotate.cpp

@@ -127,6 +127,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
 #if wxUSE_LIBPNG
     wxImage::AddHandler( new wxPNGHandler );
 #endif

samples/sashtest/sashtest.cpp

@@ -40,6 +40,9 @@ int winNumber = 1;
 // Initialise this in OnInit, not statically
 bool MyApp::OnInit(void)
 {
+  if ( !wxApp::OnInit() )
+    return false;
+
   // Create the main frame window
 
   frame = new MyFrame(NULL, wxID_ANY, _T("Sash Demo"), wxPoint(0, 0), wxSize(500, 400),

samples/scroll/scroll.cpp

@@ -672,6 +672,9 @@ void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxFrame *frame = new MyFrame();
     frame->Show( true );
 

samples/scrollsub/scrollsub.cpp

@@ -448,6 +448,9 @@ void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxFrame *frame = new MyFrame();
     frame->Show( true );
 

samples/shaped/shaped.cpp

@@ -125,6 +125,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxInitAllImageHandlers();
 
     // Create the main application window

samples/sockets/client.cpp

@@ -154,6 +154,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   // Create the main application window
   MyFrame *frame = new MyFrame();
 

samples/sockets/server.cpp

@@ -123,6 +123,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+  if ( !wxApp::OnInit() )
+      return false;
+
   // Create the main application window
   MyFrame *frame = new MyFrame();
 

samples/sound/sound.cpp

@@ -159,6 +159,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("wxWidgets Sound Sample"));
 

samples/splash/splash.cpp

@@ -123,6 +123,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     wxImage::AddHandler(new wxPNGHandler);
 
     // create the main application window

samples/splitter/splitter.cpp

@@ -148,6 +148,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create and show the main frame
     MyFrame* frame = new MyFrame;
 

samples/statbar/statbar.cpp

@@ -267,6 +267,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     MyFrame *frame = new MyFrame(_T("wxStatusBar sample"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/taskbar/tbtest.cpp

@@ -37,6 +37,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit(void)
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     dialog = new MyDialog(NULL, wxID_ANY, wxT("wxTaskBarIcon Test Dialog"), wxDefaultPosition, wxSize(365, 290));
 

samples/text/text.cpp

@@ -425,6 +425,9 @@ enum
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame *frame = new MyFrame((wxFrame *) NULL,
             _T("Text wxWidgets sample"), 50, 50, 700, 550);

samples/thread/thread.cpp

@@ -363,6 +363,9 @@ MyApp::MyApp()
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // uncomment this to get some debugging messages from the trace code
     // on the console (or just set WXTRACE env variable to include "thread")
     //wxLog::AddTraceMask("thread");

samples/toolbar/toolbar.cpp

@@ -269,6 +269,9 @@ IMPLEMENT_APP(MyApp)
 // main frame
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame* frame = new MyFrame((wxFrame *) NULL, wxID_ANY,
                                  _T("wxToolBar Sample"),

samples/treectrl/treetest.cpp

@@ -154,6 +154,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame *frame = new MyFrame(wxT("wxTreeCtrl Test"), 50, 50, 450, 600);
 

samples/typetest/typetest.cpp

@@ -72,6 +72,9 @@ wxString file_name2 = wxString(_T("test_wx2.dat"));
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create the main frame window
     MyFrame *frame = new MyFrame((wxFrame *) NULL, _T("wxWidgets Types Demo"),
                                  wxPoint(50, 50), wxSize(450, 340));

samples/validate/validate.cpp

@@ -74,6 +74,9 @@ IMPLEMENT_APP(MyApp)
 
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // Create and display the main frame window.
     MyFrame *frame = new MyFrame((wxFrame *) NULL, wxT("Validator Test"),
                                  50, 50, 300, 250);

samples/vscroll/vstest.cpp

@@ -213,6 +213,9 @@ IMPLEMENT_APP(VScrollApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool VScrollApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // create the main application window
     VScrollFrame *frame = new VScrollFrame;
 

samples/wizard/wizard.cpp

@@ -353,6 +353,9 @@ IMPLEMENT_APP(MyApp)
 // `Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     MyFrame *frame = new MyFrame(_T("wxWizard Sample"));
 
     // and show it (the frames, unlike simple controls, are not shown when

samples/xrc/xrcdemo.cpp

@@ -60,6 +60,9 @@ IMPLEMENT_APP(MyApp)
 // 'Main program' equivalent: the program execution "starts" here
 bool MyApp::OnInit()
 {
+    if ( !wxApp::OnInit() )
+        return false;
+
     // If there is any of a certain format of image in the xrcs, then first
     // load a handler for that image type. This example uses XPMs, but if
     // you want PNGs, then add a PNG handler, etc. See wxImage::AddHandler()