In , Tom Ogilvy
spake thusly:

I would guess that non-office files don't have the extended
properties offered by the compound document format.

Ah. That would explain why I got the permissions error using the
macro Bob provided, I guess.

You can also play with the scripting runtime: This isn't set up as a
worksheet function.

Cool beans. I'll keep it around for pedagogical reasons and play.
Thanks again!

Dallman