Before using Help+Manual with a version control system (VCS) it's important to understand how your project is linked to the VCS database and how the two interact. The following introduction will make it easier to use the VCS support functions because it will enable you to understand what is actually happening when you use them.
By the way: If you are just getting started, our recommendation is to use Subversion. It is the more modern and capable system. Also, Microsoft has now discontinued VisualSource Safe, so that is no longer an option and it has no usable support for offline working anyway.