How can i open a child window using nehe code ? i tried modifying and re-using the createglwindow() function, but i keep on getting a ''failed to register window class'' error ...

you can''t register the same window class twice. register the class, eg "myopenglwindowclass" and call CreateWindow[Ex]() once per every window you want to create. you will need to supply each windows with its own RC and call wglMakeCurrent() prior to renderint into it. if more questions come up, just ask!

hope this helps,
Crispy