.NET Compact Framework: combine two images in one / overlay one image on another

I have two png's and I'd like to draw one on top of the other. Is there a good way of doing this in .NET Compact Framework 3.5?

The first image is the background, the second image is an overlay. The overlay will hav开发者_StackOverflow社区e transparency.

My goal would be for the overlay to be "added" to the base image. Think four star rating image added over a CD cover image.

Check out the mechanism I used on this project. It's exactly the same as what you're after.