Thanks for replay.
I understood, but I did something wrong because it isn't working. Can you correct this code, please ?

int DrawGLScene(GLvoid)
{ glClear(GL_COLOR_BUFFER_BIT |...

Hello,
This is my first post so I would like to say Hello for everyone.
In school I'm programming in openlg and I have problem. That's my code:

int DrawGLScene(GLvoid) ...