how to make a nurb circle or cylinder?

Can anyone tell me how to draw a NURBS circle or cylinder w/ openGL? I need the control points and the knot array.
Thanks in advance,
John

If anyone else is interested. I have the answer. I was given the following link- it gives info on creating a nurbs circle.http://devworld.apple.com/dev/techsupport/develop/issue25/schneider.html
John