Drawing a graph using circle

Question

Hello, I would like to know, if there is any way to draw (fill) 30% of circle one color, and 70 % other?

Thank You


Edit: FillRegion won't work for me.

I need to get something like this: http://tutor_me.tripod.com/book/images/budget.gif

And it will be dinamic ofcource. All I need to know, technique to make those pieces of circle. Please help

P.S. It's smart device project for windows mobile 6 pro