IE8 on Win7 http://akashkava.com/blog/wp-content/uploads/2009/09/IE8-on-Win7.png
Windows 7 has a new Task bar, and IE can display multiple tabs in the task bar previews, most of programs which does have not implemented this new api only shows one preview, I have an application where I have multiple tabs and I want to show each tab on this preview.
Let me elabourate more on it, I know that every new window created automatically gets a new Window in Switcher, but how to override to use it with tabbed document interface in WPF.
It certainly is possible, you can get familiar with the windows 7 taskbar api, I would recommend starting with the windows 7 taskbar developer resources.