Huehnerschaender: I don't know about CRT or TFT...I'll do some investigation but I agree with you. It must be the monitor.

jasonf: The LapTop screen and my Pc is 1024*768 but the game resolution in DxDraw.Display is 800*600*16. I did try differnet values but no change on the LapTop :-( I don't want to resize my game window to be the same as the LapTop display...

Thanks for the insight....I'm not going to worry about it too much as it works 100 % on most PC's I've tested :-)