> 1) Did you stop and restart the server before trying to use the new
> library ? The error message you got seems to indicate that you

didn't....

Yes I did.

> 2) You don't need the custom entry in firebird.conf if your UDF
> library is in the default directory.

Just to make sure I tried it out but true, I read somewhere else as
well that the standard directory needs not be explicitly mentioned.

> 4) Didn't look at your code, but what calling convention do you use
> to export your function? It needs to be cdecl, not stdcall.

What's the difference? Would you please have a look at my code and
tell me whether I got the coding right?

Thanx,

Martin