How to: Check In an Item Using a SourceSafe Plug-in
To make your changes to a source-controlled item available to other users, you must check in the item using the Check In command on the File menu of Visual Studio. Upon check-in, the version you have created is uploaded to the database and becomes the latest version. If another user has checked in a different version of the file since you checked out your version, you are prompted to merge the differences between the versions.
To check in an item using a SourceSafe plug-in:
In Visual Studio, select an item in Solution Explorer to check in.
On the File menu, click Source Control, then click Check In or Check In Now. The latter command is available if you have selected Don't show Check In dialog box when checking in items on the Environment tab in the Options dialog box. See "Plug-in Tabs for Source Control (Options Dialog Box)" in the Source Control portion of the Visual Studio Help.
Select the appropriate options for checking in the item, then click OK.