Is this possible?

[Gary Smith]

Has anyone heard, seen or wanted the following feature. Also, is this
available in cvs, wincvs or any other version control system?

I need the ability to choose which changes I have made in a file to
checkin.  The default in most systems is to merge all the changes with
those on the server. I would like to interactive say YES to the first
change NO to the second, YES to the third change etc..

Have I over looked something?

Gary.