自己利用vc＋opengl编写的单文档图形绘制程序，能够分3个窗口绘制opengl实例，是学习opengl编程及多窗口绘制的很好的例子-Vc+ opengl their use of a single document prepared graphics drawing program, to split three examples opengl rendering window is more than learning window opengl programming and a goo