diff --git a/samples/checklst/checklst.cpp b/samples/checklst/checklst.cpp
index 635a13df62..07fef62c3a 100644
--- a/samples/checklst/checklst.cpp
+++ b/samples/checklst/checklst.cpp
@@ -129,14 +129,14 @@ bool CheckListBoxApp::OnInit(void)
                                     );
     SetTopWindow(pFrame);
 
-    return TRUE;
+    return true;
 }
 
 // main frame constructor
 CheckListBoxFrame::CheckListBoxFrame(wxFrame *frame,
                                      const wxChar *title,
                                      int x, int y, int w, int h)
-                 : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h))
+                 : wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h))
 {
     // create the status line
     const int widths[] = { -1, 60 };
@@ -170,7 +170,7 @@ CheckListBoxFrame::CheckListBoxFrame(wxFrame *frame,
     SetMenuBar(menu_bar);
 
     // make a panel with some controls
-    m_panel = new wxPanel(this, -1, wxPoint(0, 0),
+    m_panel = new wxPanel(this, wxID_ANY, wxPoint(0, 0),
                           wxSize(400, 200), wxTAB_TRAVERSAL);
 
     CreateCheckListbox();
@@ -192,13 +192,13 @@ CheckListBoxFrame::CheckListBoxFrame(wxFrame *frame,
     mainsizer->Add( bottomsizer, 0, wxCENTER );
 
     // tell frame to make use of sizer (or constraints, if any)
-    m_panel->SetAutoLayout( TRUE );
+    m_panel->SetAutoLayout( true );
     m_panel->SetSizer( mainsizer );
 
     // don't allow frame to get smaller than what the sizers tell ye
     mainsizer->SetSizeHints( this );
 
-    Show(TRUE);
+    Show(true);
 }
 
 void CheckListBoxFrame::CreateCheckListbox(long flags)
@@ -247,7 +247,7 @@ CheckListBoxFrame::~CheckListBoxFrame()
 
 void CheckListBoxFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
-    Close(TRUE);
+    Close(true);
 }
 
 void CheckListBoxFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
@@ -266,7 +266,7 @@ void CheckListBoxFrame::OnCheckFirstItem(wxCommandEvent& WXUNUSED(event))
 void CheckListBoxFrame::OnUncheckFirstItem(wxCommandEvent& WXUNUSED(event))
 {
     if ( !m_pListBox->IsEmpty() )
-        m_pListBox->Check(0, FALSE);
+        m_pListBox->Check(0, false);
 }
 
 void CheckListBoxFrame::OnToggleFirstItem(wxCommandEvent& WXUNUSED(event))
@@ -304,13 +304,35 @@ void CheckListBoxFrame::OnListboxSelect(wxCommandEvent& event)
 {
     int nSel = event.GetSelection();
     wxLogStatus(this, wxT("Item %d selected (%schecked)"), nSel,
-                      m_pListBox->IsChecked(nSel) ? _T("") : wxT("not "));
+                      m_pListBox->IsChecked(nSel) ? wxT("") : wxT("not "));
 }
 
 void CheckListBoxFrame::OnListboxDblClick(wxCommandEvent& WXUNUSED(event))
 {
+    int selection = -1;
+    if(m_pListBox->GetWindowStyle() & wxLB_EXTENDED)
+    {
+        wxArrayInt list;
+        m_pListBox->GetSelections(list);
+        if(list.Count()==1)
+        {
+            selection = list.Item(0);
+        }
+    }
+    else
+    {
+        selection = m_pListBox->GetSelection();
+    }
+
     wxString strSelection;
-    strSelection.Printf(wxT("Item %d double clicked"), m_pListBox->GetSelection());
+    if ( selection != -1 )
+    {
+        strSelection.Printf(wxT("Item %d double clicked"), selection);
+    }
+    else
+    {
+        strSelection = wxT("List double clicked in multiple selection mode");
+    }
     wxMessageDialog dialog(this, strSelection, wxT("wxCheckListBox message"), wxICON_INFORMATION);
     dialog.ShowModal();
 }
@@ -325,17 +347,30 @@ void CheckListBoxFrame::OnCheckboxToggle(wxCommandEvent& event)
 
 void CheckListBoxFrame::OnButtonUp(wxCommandEvent& WXUNUSED(event))
 {
-    OnButtonMove(TRUE);
+    OnButtonMove(true);
 }
 
 void CheckListBoxFrame::OnButtonDown(wxCommandEvent& WXUNUSED(event))
 {
-    OnButtonMove(FALSE);
+    OnButtonMove(false);
 }
 
 void CheckListBoxFrame::OnButtonMove(bool up)
 {
-    int selection = m_pListBox->GetSelection();
+    int selection = -1;
+    if(m_pListBox->GetWindowStyle() & wxLB_EXTENDED)
+    {
+        wxArrayInt list;
+        m_pListBox->GetSelections(list);
+        if(list.Count()==1)
+        {
+            selection = list.Item(0);
+        }
+    }
+    else
+    {
+        selection = m_pListBox->GetSelection();
+    }
     if ( selection != -1 )
     {
         wxString label = m_pListBox->GetString(selection);
@@ -369,16 +404,20 @@ void CheckListBoxFrame::OnButtonMove(bool up)
     }
     else
     {
-        wxLogStatus(this, wxT("Please select an item"));
+        wxLogStatus(this, wxT("Please select single item"));
     }
 }
 
+// not implemented in ports other than (native) MSW yet
+#if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 void CheckListBoxFrame::AdjustColour(size_t index)
 {
-    // not implemented in ports other than (native) MSW yet
-#if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
     // even items have grey backround, odd ones - white
     unsigned char c = index % 2 ? 255 : 200;
     m_pListBox->GetItem(index)->SetBackgroundColour(wxColor(c, c, c));
-#endif // wxMSW
 }
+#else
+void CheckListBoxFrame::AdjustColour(size_t WXUNUSED(index))
+{
+}
+#endif // wxMSW
diff --git a/samples/splitter/splitter.cpp b/samples/splitter/splitter.cpp
index c50441b75f..633e94ea0b 100644
--- a/samples/splitter/splitter.cpp
+++ b/samples/splitter/splitter.cpp
@@ -108,7 +108,7 @@ public:
     void OnPositionChanged(wxSplitterEvent& event);
     void OnPositionChanging(wxSplitterEvent& event);
     void OnDClick(wxSplitterEvent& event);
-    void OnUnsplit(wxSplitterEvent& event);
+    void OnUnsplitEvent(wxSplitterEvent& event);
 
 private:
     wxFrame *m_frame;
@@ -146,9 +146,9 @@ bool MyApp::OnInit()
     // create and show the main frame
     MyFrame* frame = new MyFrame;
 
-    frame->Show(TRUE);
+    frame->Show(true);
 
-    return TRUE;
+    return true;
 }
 
 // ----------------------------------------------------------------------------
@@ -172,7 +172,7 @@ END_EVENT_TABLE()
 
 // My frame constructor
 MyFrame::MyFrame()
-       : wxFrame(NULL, -1, _T("wxSplitterWindow sample"),
+       : wxFrame(NULL, wxID_ANY, _T("wxSplitterWindow sample"),
                  wxDefaultPosition, wxSize(420, 300),
                  wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
 {
@@ -209,7 +209,7 @@ MyFrame::MyFrame()
 
     SetMenuBar(menuBar);
 
-    menuBar->Check(SPLIT_LIVE, TRUE);
+    menuBar->Check(SPLIT_LIVE, true);
     m_splitter = new MySplitterWindow(this);
 
 #if 1
@@ -222,13 +222,13 @@ MyFrame::MyFrame()
     m_right->SetBackgroundColour(*wxCYAN);
     m_right->SetScrollbars(20, 20, 5, 5);
 #else // for testing kbd navigation inside the splitter
-    m_left = new wxTextCtrl(m_splitter, -1, _T("first text"));
-    m_right = new wxTextCtrl(m_splitter, -1, _T("second text"));
+    m_left = new wxTextCtrl(m_splitter, wxID_ANY, _T("first text"));
+    m_right = new wxTextCtrl(m_splitter, wxID_ANY, _T("second text"));
 #endif
 
     // you can also do this to start with a single window
 #if 0
-    m_right->Show(FALSE);
+    m_right->Show(false);
     m_splitter->Initialize(m_left);
 #else
     // you can also try -100
@@ -246,15 +246,15 @@ MyFrame::~MyFrame()
 
 void MyFrame::Quit(wxCommandEvent& WXUNUSED(event) )
 {
-    Close(TRUE);
+    Close(true);
 }
 
 void MyFrame::SplitHorizontal(wxCommandEvent& WXUNUSED(event) )
 {
     if ( m_splitter->IsSplit() )
         m_splitter->Unsplit();
-    m_left->Show(TRUE);
-    m_right->Show(TRUE);
+    m_left->Show(true);
+    m_right->Show(true);
     m_splitter->SplitHorizontally( m_left, m_right );
 
     SetStatusText(_T("Splitter split horizontally"), 1);
@@ -264,8 +264,8 @@ void MyFrame::SplitVertical(wxCommandEvent& WXUNUSED(event) )
 {
     if ( m_splitter->IsSplit() )
         m_splitter->Unsplit();
-    m_left->Show(TRUE);
-    m_right->Show(TRUE);
+    m_left->Show(true);
+    m_right->Show(true);
     m_splitter->SplitVertically( m_left, m_right );
 
     SetStatusText(_T("Splitter split vertically"), 1);
@@ -345,16 +345,16 @@ void MyFrame::UpdateUIUnsplit(wxUpdateUIEvent& event)
 // ----------------------------------------------------------------------------
 
 BEGIN_EVENT_TABLE(MySplitterWindow, wxSplitterWindow)
-    EVT_SPLITTER_SASH_POS_CHANGED(-1, MySplitterWindow::OnPositionChanged)
-    EVT_SPLITTER_SASH_POS_CHANGING(-1, MySplitterWindow::OnPositionChanging)
+    EVT_SPLITTER_SASH_POS_CHANGED(wxID_ANY, MySplitterWindow::OnPositionChanged)
+    EVT_SPLITTER_SASH_POS_CHANGING(wxID_ANY, MySplitterWindow::OnPositionChanging)
 
-    EVT_SPLITTER_DCLICK(-1, MySplitterWindow::OnDClick)
+    EVT_SPLITTER_DCLICK(wxID_ANY, MySplitterWindow::OnDClick)
 
-    EVT_SPLITTER_UNSPLIT(-1, MySplitterWindow::OnUnsplit)
+    EVT_SPLITTER_UNSPLIT(wxID_ANY, MySplitterWindow::OnUnsplitEvent)
 END_EVENT_TABLE()
 
 MySplitterWindow::MySplitterWindow(wxFrame *parent)
-                : wxSplitterWindow(parent, -1,
+                : wxSplitterWindow(parent, wxID_ANY,
                                    wxDefaultPosition, wxDefaultSize,
                                    wxSP_3D | wxSP_LIVE_UPDATE |
                                    wxCLIP_CHILDREN /* | wxSP_NO_XP_THEME */ )
@@ -385,7 +385,7 @@ void MySplitterWindow::OnDClick(wxSplitterEvent& event)
     event.Skip();
 }
 
-void MySplitterWindow::OnUnsplit(wxSplitterEvent& event)
+void MySplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 {
     m_frame->SetStatusText(_T("Splitter unsplit"), 1);
 
@@ -397,7 +397,7 @@ void MySplitterWindow::OnUnsplit(wxSplitterEvent& event)
 // ----------------------------------------------------------------------------
 
 MyCanvas::MyCanvas(wxWindow* parent, bool mirror)
-        : wxScrolledWindow(parent, -1, wxDefaultPosition, wxDefaultSize,
+        : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
                            wxHSCROLL | wxVSCROLL | wxNO_FULL_REPAINT_ON_RESIZE)
 {
     m_mirror = mirror;