Is this possible?

I have a core library (vba project, "LibA") that I want to be ignorant of
any consumers. If I set up a separate project ("LibB") that has a reference
set to "LibA", there are times when I may like to make a piece of
information available from LiibB to LibA.

I thought the natural solution would be to set up an event that broadcasts
the need for information in LibA, with and event handler in LibB to provide
it. Doing so compiles, but doesn't seem to work.

TIA,
Eric