Visual Studio Add in like Solution Explorer

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Visual-Studio

AddIn

Hello,
I am aware of Visual Basic and C++ development, I want to create a add-in in visual studio which looks similar to Solution explorer. Which can be dockable next to solution tree.
I want control on the tree structure where I can define what files has to be listed and in what order?
Can some one give me some hint on this, how to start with. I would appreciate if some one can share some code snippet to understand the implementation.

Thanks.
Dhiresh