title: wxWidgets transparent frame with opaque controls
body: <p>I've a frame with wxStaticBitmap when i make the frame semi-transparent using wxTopLevelWindow::SetTransparent(), staticbitmap also gets transparent. 
  Is there a way we can make only the frame transparent and not the controls?.
  (similar to windows 7 taskbar and startmenu). </p>
  
  <p>Thanks in advance,</p>
  
  <p>Have a nice day! 
  Rajan.M</p>