IDirectDrawSurface7::Blt function does not work with secondary screen [modified]
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Hi all, I'm having trouble with drawing on a secondary screen. When I use IDirectDrawSurface7::Blt to draw with a window totally inside the primary screen, it works well. However, when I move the window so that it's half on primary screen and half on secondary screen or move the window so that it's inside the secondary screen, this function returns E_NOTIMPL. What should I do to make it works on secondary screen? Please help me! Thanks. -- modified at 23:03 Sunday 17th June, 2007