Check out this project: Service Pack for Windows® API for Microsoft® .NET Framework
This is an attempt to wrap functions open in new versions of the native Windows API so that you can easily call them from a managed .NET application. In particular, it supports “Jump Lists, Icon Overlays, Progress Bar, Thumbnail Tabs and Thumbnail Toolbars” for the new Windows 7 taskbar.
, .NET 2.0, 3.5 SP1. , , , , P/Invoke. , 2.0 Framework.