Certainly Visual Studio Team System 2008 Team Foundation Server is one of the first Microsoft products that was never intended to be ready-to-use right after a successful installation. In particular it benefits from being customized to your specific needs prior to being used. We distinguish between customization, which could be done by a technical-experienced project leader, and classic extensions, which require a real programmer to develop them. This session focuses on the latter. By means of a practical example this session demonstrates the possibilities and power of the extensibility interfaces of Team Foundation Server.