MS-Windows, and CS-RCS handle files with LNK extensions as a shortcuts to files. Sometimes, it's desired to add the shortcut itself to the repository. You can do it from the command-line. For example, execute Run | Start and type:
csrcs add "C:\test\Shortcut to testlnk.doc.lnk"
Note: Some development environments use the LNK extension for control files. You may use the same method to add these files to the repository.