If you are performing a routine project difference, by default the Compare field will contain the project in VSS and the To field will contain its counterpart in the working folder. You can edit the Compare field, or you can click the Browse button to specify your selection. Using the Browse buttons, you can compare two projects in VSS (in the same project or other projects), two local projects (in the same directory or different directories), or a project in VSS and a local project.
Scan the contents of either the VSS project or local folder and all its subprojects; shows all differences between the two respective projects or local folders.
Execute the Show Differences command.
Cancel the Show Differences command and close the dialog.