How do I close the openGL window without closing my main window ? if i create the opengl window like this : int main ( int argc, char** argv ) { glutInit ( &argc, argv ); glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); glutInitWindowSize ( 640, 480 ); glutCreateWindow ( argv[0] ); init ( ); glutReshapeFunc ( reshape ); glutMouseFunc ( mouse ); glutMotionFunc ( motion ); glutKeyboardFunc ( keyboard ); glutSpecialFunc (vSpecial ); glutDisplayFunc ( display ); glutIdleFunc ( idle_func ); glutMainLoop ( ); return 0; }

GLUT needs at least one window to works. If you are talking about the Win32 console window, you could do something like this:

int main ( int argc, char** argv )
{
glutInit ( &argc, argv );
glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize ( 640, 480 );

glutCreateWindow ( argv[0] );

init ( );
glutReshapeFunc ( reshape );
glutMouseFunc ( mouse );
glutMotionFunc ( motion );
glutKeyboardFunc ( keyboard );

glutSpecialFunc (vSpecial );

glutDisplayFunc ( display );
glutIdleFunc ( idle_func );
glutMainLoop ( );

//----------------------------------------------------------
// Do something else here before return to the system.
//----------------------------------------------------------
//...

return 0;
}