If you are serious about the practice of software development, you should avoid SourceSafe.
SourceSafe poisons the minds of software developers.
Visual Source Safe sucks. Jeff Atwood explains in no uncertain terms why it sucks and I just want to get my vote in. The two most important issues he points out is that VSS gives the illusion of safety and VSS users DON’T BRANCH!
They fear branching because it takes so much time and it is just a foreign concept to them.
Do yourself a favor, get a real tool. Be a real programmer.