I've worked with VB extensively as well. Not for the last year however ;-). From all I can recall, one way to approach your problem would be to liken Perl modules to an OCX (or COM) object in VB. For example, VB has a Database interface COM object which could be brought up in your discussion on a variation of DBI module (for MySQL databases). As far as the CGI works, I'm not sure if you could compare anything unless the audience has written any ASP type of application in VB script. By and large, explaining CGI is a different matter.. it's simply a different 'technology'. So you may delve into how a server processes requests and executes scripts requested by the web client and etc.

As far as GTK+ goes, there's ample analogies that one could come up with when it comes to VB. VB programmers are accustomed to interacting with their application GUI via a set of GUI interfaces (objects + their methods/attributes). So you might think of likening the two this way.

Sorry, that's just about as much as I may recall right now ;-)). Hope this is useful.

Cheers,

"There is no system but GNU, and Linux is one of its kernels." -- Confession of Faith