Source Insight is built around projects. A project is a collection of source files. When you create a project, you need to add files to it. Source Insight records what files are in the project by keeping a simple file database for the project.
The Add and Remove Project Files dialog box lets you add individual files, or whole directory trees to your project. For more information, See also “Add and Remove Project Files”.
As you create new files, they can be added to your project when you save them. If new files appear in your project directory or subdirectories, they can also be added automatically to your project by running the Synchronize Files command.