// i.e. we don't want to combine the backing store with the
// possibly wrong preexisting contents of the window!
dc.DrawBitmap(m_backingStore, 0, 0, false /* no mask */);
// i.e. we don't want to combine the backing store with the
// possibly wrong preexisting contents of the window!
dc.DrawBitmap(m_backingStore, 0, 0, false /* no mask */);