Here''s a real sticky problem. Inside of my program when I initialize OpenGL I use the function ChoosePixelFormat(). It works perfectly and the game runs like a champ, however... if I try running it in debug mode VC++''s debugger stops on it and insists that there''s something wrong or something to that effect. It pops up a window of assembly, and does not continue to my breakpoint that I set later in the program. Paranoid that I did something bad I went to NeHe''s site and downloaded a project. It appears that the same thing happens if you trace through his programs. Is it possible that a breakpoint can be inside of a library? Is there some way to disable this problem or is it simply a debug tool bug? valg3