'BitmapFromBuffer',
         'RawBitmapAccess',
         'DragScroller',
+##        'AlphaDrawing',
+        'DelayedResult',
         ]),
 
     # managed windows == things with a (optional) caption you can close
 
     # ditto
     ('Process and Events', [
+        'DelayedResult',
         'EventManager',
         'KeyEvents',
         'Process',
 
     # Images
     ('Using Images', [
+##        'AlphaDrawing',
         'ArtProvider',
         'BitmapFromBuffer',
         'Cursor',
 
     # Other stuff
     ('Miscellaneous', [
+##        'AlphaDrawing',
         'ColourDB',
         ##'DialogUnits',   # needs more explanations
         'DragScroller',
         icon = images.getWXPdemoIcon()
         self.SetIcon(icon)
 
-        self.tbicon = DemoTaskBarIcon(self)
-
+        try:
+            self.tbicon = DemoTaskBarIcon(self)
+        except:
+            self.tbicon = None
+            
         wx.CallAfter(self.ShowTip)
 
         self.otherWin = None
         self.demoPage = None
         self.codePage = None
         self.mainmenu = None
-        self.tbicon.Destroy()
+        if self.tbicon is not None:
+            self.tbicon.Destroy()
         self.Destroy()