Windows资源管理器就像文件夹树浏

I am trying to implement a platform independent file/directory tree browser. Basically, I am trying to replicate windows explorer's tree control to browse the computer. However, I can't figure out how to find the "Desktop" or "My Computer" folder string (It changes in every pc and os type, version and language). If I can find a way to get the topmost folder string, than I can traverse down and populate the tree hopefully. Is there a registry string somewhere?I am trying to implement a platform independent