How to change default program (notepad) which opens a selected file when viewing a TFS changeset in Visual Studio 2010?

Question

I open the History in the Source Control, then open a changeset, then select a file in the file list and double click to open it. TFS open the file by Notepad, I wanna open the file by Visual Studio or by any other text editor (to have syntax highlight). How can I do this?

ps. In my machine, when I open a .config file like app.config, TFS ask for a program to open it! I want TFS ask for the .cs file also ^_^! There must be somewhere to set this I guess.

Answer 1

Possible duplicate of http://stackoverflow.com/questions/1626476/tfs-how-do-i-view-cs-files-in-the-vs-ide-when-viewing-details-of-a-shelveset