The Test Automation FX framework installs inside of Visual Studio (2008 & 2010) with custom project templates and designers that allow you to build automated user interface tests in your favorite IDE.
TAFX works with all versions of Visual Studio, also the free Express versions. (You can download them from here.)
All features of Visual Studio can be used in combinations with the Test Automation FX framework. For instance if you rename an object in the test the built in refactoring support will change all the test logic to work with the new name automatically.