+    else
+        event.Skip();
+}
+
+// Handlers for UI update commands
+
+void wxDocManager::OnUpdateFileOpen(wxUpdateUIEvent& event)
+{
+    event.Enable( true );
+}
+
+void wxDocManager::OnUpdateFileClose(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( (doc != (wxDocument*) NULL) );
+}
+
+void wxDocManager::OnUpdateFileRevert(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( (doc != (wxDocument*) NULL) );
+}
+
+void wxDocManager::OnUpdateFileNew(wxUpdateUIEvent& event)
+{
+    event.Enable( true );
+}
+
+void wxDocManager::OnUpdateFileSave(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( doc && doc->IsModified() );
+}
+
+void wxDocManager::OnUpdateFileSaveAs(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( (doc != (wxDocument*) NULL) );
+}
+
+void wxDocManager::OnUpdateUndo(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    if (!doc)
+        event.Enable(false);
+    else if (!doc->GetCommandProcessor())
+        event.Skip();
+    else
+    {
+        event.Enable( doc->GetCommandProcessor()->CanUndo() );
+        doc->GetCommandProcessor()->SetMenuStrings();
+    }
+}
+
+void wxDocManager::OnUpdateRedo(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    if (!doc)
+        event.Enable(false);
+    else if (!doc->GetCommandProcessor())
+        event.Skip();
+    else
+    {
+        event.Enable( doc->GetCommandProcessor()->CanRedo() );
+        doc->GetCommandProcessor()->SetMenuStrings();
+    }
+}
+
+void wxDocManager::OnUpdatePrint(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( (doc != (wxDocument*) NULL) );
+}
+
+void wxDocManager::OnUpdatePreview(wxUpdateUIEvent& event)
+{
+    wxDocument *doc = GetCurrentDocument();
+    event.Enable( (doc != (wxDocument*) NULL) );