>Agnes,
>
>As a supplement to backups, I recommend using source-control / version control. Visual SourceSafe is one option; I currently use Perforce (www.perforce.com), mainly because it is free for 1-2 developers (for larger groups, it costs about the same as VSS). However, there are also other freeware options.
>
>Hilmar.

Hello Hilmar,
I use VSS (more than one developer!) in its normal manner and a tool named SecondCopy to do a automated backup every hour.

But this represent a kind of snapshot.
The vcx holds complete class every time you save the class.

Agnes