Running a VB6 program under Windows 7 XP Mode

[Rotwatcher]

Years ago I wrote a program in VB4 16-bit, which was later ported to
VB6. I've just had a request for support from a client who is trying
to run it under Windows 7 Professional with Virtual PC XP Mode, who
gets an error right from the get-go:

Runtime Error 91 Object Variable or With Block variable not set

The Error Log shows 3043,"Could not load VBA expression service
library."

I'm tempted to say that the proposed o/s isn't supported, but I don't
want to rain on his parade unnecessarily.

Thoughts?

Thanks

Edward

[DickGrier]

It sounds like the program calls a dll that hasn't been installed on the
target machine. Take a look at your code to see if there are any references
that might require that an external file be added (and, probably,
registered). There is a VBA Expressions Library that adds Regular
Expressions functions, non-Microsoft, I believe. This may the the one.

Dick

[Nobody]

Multiposted and answered in vb.general.discussion group.