WM_PAINT message

...is needed for OpenGL.

You know Halo, it would be nice if you could take the time to inlcude an explanation for your thread. If, by chance, I could offer some help, I would need to know more about the problem.

I'm not even sure if you've stated enough information for whoever this message was intended for.

For when another window erases the front buffer of an OpenGL viewport. I was trying to get the info wih PeekMessage(), but it wasn't happening. If I knew when to do it, I could just flip the GL buffer real quick.

I think such message is directly managed by the default BlitzWindowCallBack procedure, that's why you don't get it.

Yes, but B+ could still return the event to let you know it happened.