I just released a kite flying demo written in OpenGL using NeHe''s base code. It seems to run fine for most people but a few are complaining of missing gui (homebrew OpenGL gui) or that it hangs their computer. Seems like laptops and XP have the most problems? Do you all have simular problems and is there anything I can do except point them to glsetup.com? Is DirectX better in terms of portability? I sure hate hanging other peoples computer! Thanks, J.R. http://users.rcn.com/windsurf/kiteflight.htm