Menees VS Tools adds several new commands to process selected text, add new text, and work with open files. It started life in 2001 as an add-in for Visual C++ 6, and it has been rewritten a couple of times since for various versions of Visual Studio. Commands include:
For more information (including the full source code for the extension) see http://www.menees.com/VSTools.htm.
This software is CharityWare. If you use it, I ask that you make a $5 US donation to the charity of your choice.