title: Can I force a parent window to redraw without causing its children to redraw?
body: <p>Is it possible to invalidate a window without invalidating its children? (display invalidation to cause a repaint of the parent window, but not redraw its children) </p>
  
  <p>This assumes that the parent window already has the "clipchildren" style, so that its painting wouldn't inherently invalidate the children.</p>