A nice article dealing with one of those happy fun balls.
The CodeDOM is the most recent thing I was digging through the documentation of.
MSBuild Task Generator: Part 6. Conditional statements in the CodeDOM. (Robert Horvick's Weblog)
Happy fun ball is made from an unknown glowing substace that fell from space.
If you have good references and articles about the using CodeDOM in various situations, please post them in the comments.