> I created a DLL with C++ Builder,
> and I included VCL and IBObjects within

Which version of BCB? I have a UDF DLL created with BCB4, however it
wont do you much good as an example as mine very definitely avoids all
things VCL.

Speaking of which. Why have you included the VCL and IBO? I would
have severe reservations about this, the VCL was not designed to be
hit randomly from various threads in the manner that IB may operate.
If you are only using it as a source of utility functions (ensuring
that you are only using functions that do not access any global
objects) then you may be ok.

If you really need to perform real VCL/IBO operations (using VCL/IBO
objects) then I suggest you write a service application for the
server. It can poll a table (or receive events) and perform
operations as an independant application.

If you need to continue with your current approach, Helens suggested
link to Greg Deatz's article is probably your best bet. Thats where I
started.

Geoff Worboys
Telesis Computing