Microsoft Gadget

There is some resource about How to write a Gadget in VS2005.

• Sidebar Gadget开发教程(1)
• Sidebar Gadget开发教程(2)
• Sidebar Gadget开发教程(3)
• 译文:Sidebar安全性探讨

For SDK of MS Gadget, You can refer this site for more detail, or go to Gadget Blog.