OK Thanks for your time. So I want to create a NURBS curve with a hole in the centre, or possibly multiple holes.
Based on your suggestions above, I create a square from the rectangle too, or composing 4 lines together. Then I convert to a NURBS surface (Create Surface from Curves), and the lines turn red. Then according to your suggestions above, I can transform that surface by the use of 2D trim lines or polygon shapes. So I take a 2D circle, and try to 'Clip' the circle from the NURBS surface, and it tells me I have illegal objects ...
I must be missing the obvious here.
Thanks Islandmon!
Eddie