4 in a row source code

I just published the source code of my 4 in a row program on my four in a row page. While this doesn't appear to fit in a computer checkers blog, I think it does belong for two reasons: first, it is an example of how to write a high-performance game program. Second, this is the second part of my plan to publish some of my source code (CheckerBoard came in first). More to follow...