Anyone knows of a good tutorial on using gtk2+ with opengl? : I am writing a C program that makes use of fixed pipeline opengl and freeglut. However, I would like to use a complete toolkit like GTK+ instead of freeglut. I cannot use GTK3+ as it is not compatible with old opengl code, so I would like to use gtk2+. Howver I cannot find any tutorials on combining gtk2+ with opengl. Anyone knows of any good tutorials on gtk2+ plus old opengl?