glh library in nvidia SDK

I found glh library in NVIDIA SDK(written by Cass Everitt) quite useful. However, I can oly find a document contained its method list without any further description at http://graphics3d.com.

Is there any detailed document or tutorial about this library?

Timchen

I want to be a kung foo fighta! And eat subs! Pizza is good too all 7 of them. yum.