I posted this same question on a different forum, and the general consensus was that it's still everywhere. For example, I still support VB6 apps on the job. Microsoft has stopped supporting it, though. Someone on the thread directed me to a bunch of open-source compilers.
Remember that there are still more programs written in COBOL than in any other language out there (and it has an overwhelming majority - something like 80% of all existing code is COBOL code), and that's considered a "dead" language by many.
Too bad, VB6 was a great beginner's language. Very easy to use. Of course it had its problems. But it was around for so long I doubt all VB6 apps have been converted to VB
.NET at this point (I doubt all ever will be). Wrox put out a VB6 book in the last few years as a resource for the "VB6 community". Not sure where that's gone.
EDIT: added comments about COBOL (REEEEL important!