I figured i could use ChangeScreenResolution() function in my code to change the full screen resolution but i cannot seem to resize the viewport for opengl. I have tried the function ReshapeGL() and it works for the width of the window but not the height. which to me doesn''t make much sence. I do send the same screen width and height to both functions so i know thats not the problem. Now i''m wondering is the only way to do it by destroying the window and then recreating it? or can i use the oop code to get it to work in some way? Thank you, Paul