> What about windows fbembed.dll ? Can it be accessed by two concurrent
> programs running from the same directory ?

Yes, but only the first instance will get access to the database if
you both applications to access the same database.

> I heard something about shared DLL's but I'm not sure if this is
> that case.

Sharing a DLL between several applications simultaneously is what DLLs
are all about.

The whole Windows operating system itself is simply a large collection
of DLLs, which are shared by all the applications that are running.


Best Regards

Stefan