"Pegasus86" <Pegasus86(at)katamail(dot)com> writes:
> I have created a db which contains a function linked to a C function
> contained in a dll. This function should show a message box to the users.
This makes no sense whatsoever, as a C function will run in the server
process, which may not even be on the same machine as the clients, and
certainly will not have access to their screens given any minimal
concern for security in the system setup.
regards, tom lane