There are some new Windows Mobile Starter Kits published recently on MSDN demonstrating different technologies include DirectDraw on mobile applications, WIndows Mobile Ink APIs, Home Screen APIs, etc.
A starter kit is a useful and ready-to-run project which helps developers to understand the concepts of various technologies. It comes with a detailed documentation which helps developers to understand the code and structure of the programming project in the starter kit. Developers can develop their own application based on the existing starter kits.
The following link on MSDN explains the details of the starter kits and provides links for you to download them.
http://msdn2.microsoft.com/en-us/windowsmobile/bb264330.aspx