Plug-in for Visual Studio for quick-searching files in solution

Question

I want to write an Add-In for Visual Studio that provides instant search for the solution explorer. So you press a key combination and while you are typing a list first containing all files of the solution explorer gets narrowed down.

But how can I get access to the solution explorer using C#? Does anyone have some good resources?

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Edit: I edited the title, so that it more relates to the content, since all of you posted already made plug-ins.

Answer 1

Sonic File Finder it's free

When you hit the shortcut you have a search box with autocomplete: alt text http://jens-schaller.de/files/images/SonicFileFinder/sonicFileFinderToolWindow.png