C# Region clip to a rectangle?

Thanks for the link. Right now, i have two ArrayLists - one contains the rectanlges and one contains the circles. The circles are palced randomly, some overlay the rectangles.

 I would like to clip the regions of those circles such that circles will be visible within each rect? As i'll will be doing the .isVisible method if detecting the circles in the rectange itself. I'm lost here.. pls help..

I suggest you look at the Region class in GDI+. Here is an article in clipping as well.

	Regions and Clipping in GDI+

Cheers!