Here''s the deal: I''m using DirectDraw7 to create a windowed application running under WinXP (the app itself is a comprehensive tool for building animated game sprites). I''ve got the primary and back buffer surfaces set up correctly (not a flipping chain, just a DDSCAPS_PRIMARYSURFACE and a DDSCAPS_OFFSCREENPLAIN!) and DirectX reports that the Blt() function is working properly (the actual "error" string is S_OK ''The blit completed successfully.'') I''m calling that blit in the WM_PAINT handler by the way, it''s supposed to draw the sprites onto predefined "slots" on the window. Anyway... Despite the S_OK message, the blit doesn''t show up. There''s no errors, and the window renders fine, but the stuff I''m blitting just doesn''t appear. I checked the clipper, that''s correct as well. Here''s the catch: I was looking through some sample code that renders sprites in a full screen or windowed app (there''s two seperate EXEs for it). Full screen works fine, but in windowed mode the sprites are just pink rectangles on a black background, and their movement is severely jacked as well. Does WinXP have some kind of crazy incompatibility with DDraw7 in windowed mode? I''ve tried everything I can think of to no avail. Any thoughts are greatly appreciated. That is all.