Steve,

>> how you would manage to load two different client libraries
>> (gds32.dll for InterBase and fbclient.dll for Firebird) into one
>> application...

SH> In the Firebird data module I'd include the IB_FirebirdSession unit
SH> you mentioned earlier and in the Interbase data module I wouldn't.
SH> Assuming that the server engines are not running on the local box and
SH> I'm using cpTCP_IP for a protocol, would a single application be able
SH> to access both clients?

you'd need provision in IBO for loading multiple client libraries at
the same time. I once needed such a thing, so I did it and sent the
patches to Jason (you were allowed to specify the client library at
the TIB_Session level, AFAIR). It was enough for my needs but it was
not production-ready because there were niggles with IB_Monitor &
other stuff. It was about a year ago, but apparently Jason hasn't
found the time to iron out those niggles yet. It is possible that they
cannot be solved so you will never have this capability in IBO. I just
don't know. I'll just add that I have been able to use fbclient 1.5
and fbembed 1.5 to work successfully with anything from IB 5.6 to
Firebird 1.5 in the past.

HTH
--
Nando Dessena
http://www.flamerobin.org