diff --git a/samples/html/about/about.cpp b/samples/html/about/about.cpp
index eac43f4e19..e5e0c7645c 100644
--- a/samples/html/about/about.cpp
+++ b/samples/html/about/about.cpp
@@ -113,14 +113,14 @@
 
     // Show it and tell the application that it's our main window
     // @@@ what does it do exactly, in fact? is it necessary here?
-      frame->Show(TRUE);
+      frame->Show(true);
       SetTopWindow(frame);
 
 
     // success: wxApp::OnRun() will be called which will enter the main message
-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the
     // application would exit immediately.
-      return TRUE;
+      return true;
    }
 
 // ----------------------------------------------------------------------------
@@ -130,7 +130,7 @@
 
 // frame constructor
    MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-   : wxFrame((wxFrame *)NULL, -1, title, pos, size)
+   : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
    {
     // create a menu bar
       wxMenu *menuFile = new wxMenu;
@@ -151,19 +151,19 @@
 
    void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
    {
-    // TRUE is to force the frame to close
-      Close(TRUE);
+    // true is to force the frame to close
+      Close(true);
    }
 
    void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
    {
         wxBoxSizer *topsizer;
         wxHtmlWindow *html;
-        wxDialog dlg(this, -1, wxString(_("About")));
+        wxDialog dlg(this, wxID_ANY, wxString(_("About")));
 
         topsizer = new wxBoxSizer(wxVERTICAL);
 
-        html = new wxHtmlWindow(&dlg, -1, wxDefaultPosition, wxSize(380, 160), wxHW_SCROLLBAR_NEVER);
+        html = new wxHtmlWindow(&dlg, wxID_ANY, wxDefaultPosition, wxSize(380, 160), wxHW_SCROLLBAR_NEVER);
         html -> SetBorders(0);
         html -> LoadPage(wxT("data/about.htm"));
         html -> SetSize(html -> GetInternalRepresentation() -> GetWidth(), 
@@ -171,14 +171,14 @@
 
         topsizer -> Add(html, 1, wxALL, 10);
 
-        topsizer -> Add(new wxStaticLine(&dlg, -1), 0, wxEXPAND | wxLEFT | wxRIGHT, 10);
+        topsizer -> Add(new wxStaticLine(&dlg, wxID_ANY), 0, wxEXPAND | wxLEFT | wxRIGHT, 10);
                         
         wxButton *bu1 = new wxButton(&dlg, wxID_OK, _("OK"));
         bu1 -> SetDefault();
 
         topsizer -> Add(bu1, 0, wxALL | wxALIGN_RIGHT, 15);
 
-        dlg.SetAutoLayout(TRUE);
+        dlg.SetAutoLayout(true);
         dlg.SetSizer(topsizer);
         topsizer -> Fit(&dlg);
 
diff --git a/samples/html/help/help.cpp b/samples/html/help/help.cpp
index 0e6ed46d88..1f6448b31d 100644
--- a/samples/html/help/help.cpp
+++ b/samples/html/help/help.cpp
@@ -120,14 +120,14 @@
 
     // Show it and tell the application that it's our main window
     // @@@ what does it do exactly, in fact? is it necessary here?
-      frame->Show(TRUE);
+      frame->Show(true);
       SetTopWindow(frame);
 
 
     // success: wxApp::OnRun() will be called which will enter the main message
-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the
     // application would exit immediately.
-      return TRUE;
+      return true;
    }
 
 // ----------------------------------------------------------------------------
@@ -137,7 +137,7 @@
 
 // frame constructor
    MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-   : wxFrame((wxFrame *)NULL, -1, title, pos, size), 
+   : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size), 
      help(wxHF_DEFAULT_STYLE | wxHF_OPEN_FILES)
    {
     // create a menu bar
@@ -169,8 +169,8 @@
 
    void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
    {
-    // TRUE is to force the frame to close
-      Close(TRUE);
+    // true is to force the frame to close
+      Close(true);
    }
 
    void MyFrame::OnHelp(wxCommandEvent& WXUNUSED(event))
@@ -183,7 +183,7 @@
        // Close the help frame; this will cause the config data to
        // get written.
        if ( help.GetFrame() ) // returns NULL if no help frame active
-           help.GetFrame()->Close(TRUE);
+           help.GetFrame()->Close(true);
        // now we can safely delete the config pointer
        event.Skip();   
        delete wxConfig::Set(NULL);
diff --git a/samples/html/helpview/helpview.cpp b/samples/html/helpview/helpview.cpp
index d77e758829..24224c7d6e 100644
--- a/samples/html/helpview/helpview.cpp
+++ b/samples/html/helpview/helpview.cpp
@@ -1,4 +1,3 @@
-
 /////////////////////////////////////////////////////////////////////////////
 // Name:        helpview.cpp
 // Purpose:     wxHtml help browser
@@ -75,7 +74,7 @@ bool MyApp::OnInit()
     if (argc < 2) {
         wxLogError(wxT("Usage : helpview <helpfile> [<more helpfiles>]"));
         wxLogError(wxT("  helpfile may be .hhp, .zip or .htb"));
-        return FALSE;
+        return false;
     }
 
     for (int i = 1; i < argc; i++)
@@ -87,7 +86,7 @@ bool MyApp::OnInit()
 
     help -> DisplayContents();
 
-    return TRUE;
+    return true;
 }
 
 
diff --git a/samples/html/printing/printing.cpp b/samples/html/printing/printing.cpp
index f414cb56b2..c230fe2aa6 100644
--- a/samples/html/printing/printing.cpp
+++ b/samples/html/printing/printing.cpp
@@ -144,14 +144,14 @@ bool MyApp::OnInit()
 
     // Show it and tell the application that it's our main window
     // @@@ what does it do exactly, in fact? is it necessary here?
-    frame->Show(TRUE);
+    frame->Show(true);
     SetTopWindow(frame);
 
 
     // success: wxApp::OnRun() will be called which will enter the main message
-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the
     // application would exit immediately.
-    return TRUE;
+    return true;
 }
 
 // ----------------------------------------------------------------------------
@@ -161,7 +161,7 @@ bool MyApp::OnInit()
 
 // frame constructor
 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
+        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
 {
     // create a menu bar
     wxMenu *menuFile = new wxMenu;
@@ -214,8 +214,8 @@ MyFrame::~MyFrame()
 
 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
-    // TRUE is to force the frame to close
-    Close(TRUE);
+    // true is to force the frame to close
+    Close(true);
 }
 
 
diff --git a/samples/html/virtual/virtual.cpp b/samples/html/virtual/virtual.cpp
index 0966023137..c4d21b9431 100644
--- a/samples/html/virtual/virtual.cpp
+++ b/samples/html/virtual/virtual.cpp
@@ -166,14 +166,14 @@ wxFSFile* MyVFS::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
 
     // Show it and tell the application that it's our main window
     // @@@ what does it do exactly, in fact? is it necessary here?
-      frame->Show(TRUE);
+      frame->Show(true);
       SetTopWindow(frame);
       wxFileSystem::AddHandler(new MyVFS);
 
     // success: wxApp::OnRun() will be called which will enter the main message
-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the
     // application would exit immediately.
-      return TRUE;
+      return true;
    }
 
 // ----------------------------------------------------------------------------
@@ -184,7 +184,7 @@ wxHtmlWindow *html;
 
 // frame constructor
    MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-   : wxFrame((wxFrame *)NULL, -1, title, pos, size)
+   : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
    {
     // create a menu bar
       wxMenu *menuFile = new wxMenu;
@@ -215,8 +215,8 @@ wxHtmlWindow *html;
 
    void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
    {
-    // TRUE is to force the frame to close
-      Close(TRUE);
+    // true is to force the frame to close
+      Close(true);
    }
 
    void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
diff --git a/samples/html/zip/zip.cpp b/samples/html/zip/zip.cpp
index 655715c590..937f48bd93 100644
--- a/samples/html/zip/zip.cpp
+++ b/samples/html/zip/zip.cpp
@@ -117,14 +117,14 @@ bool MyApp::OnInit()
 
     // Show it and tell the application that it's our main window
     // @@@ what does it do exactly, in fact? is it necessary here?
-    frame->Show(TRUE);
+    frame->Show(true);
     SetTopWindow(frame);
 
     // success: wxApp::OnRun() will be called which will enter the main message
-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the
     // application would exit immediately.
 
-    return TRUE;
+    return true;
 }
 
 // ----------------------------------------------------------------------------
@@ -135,7 +135,7 @@ wxHtmlWindow *html;
 
 // frame constructor
 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-: wxFrame((wxFrame *)NULL, -1, title, pos, size)
+: wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
 {
     // create a menu bar
     wxMenu *menuFile = new wxMenu;
@@ -168,8 +168,8 @@ MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 
 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
-    // TRUE is to force the frame to close
-    Close(TRUE);
+    // true is to force the frame to close
+    Close(true);
 }
 
 void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))