> 	I'd avoid going there; this is asking for trouble
> 	because both FLTK and GLUT will compete for the
> 	window manager and event queue resources.
>
> 	Better to use an FLTK GL window, and use opengl
> 	oriented GLUT calls that don't involve event or window
> 	management.

Thanks a lot for your advices and the example. Now it works perfectly!
Bye!