It has always been configured with VSS. I used CVS yesterday, and I prestressed is not bad. There is no time to touch, a little bit of vss distinguished - it uses the Update-Commit mode, similar to Check Out-Check IN, but other people can not change it after VSS Check Out, it can also change, but if Others changed and commit, could not commit, only UPDATE COMMIT, generally consolidated 2 people to change Mrge.