You can change Visual Studio defaults to prompt you to add items to source control when you save them, or you can add files to Rational® ClearCase® control, as described in this topic.
Visual Studio windows present the files that it recommends you add to source control. In Visual Studio .NET, you have no control over which files are added to source control. For a list of Visual Studio file types, see the Visual Studio Help.
To preserve all of your source file data, you must also add projects to source control.