> > statusVector : ISC_STATUS;
>
> Too small. It must be array of 20 (at least) ISC_STATUS.

Thank's. It looks like it works fine now.

Is there a documentation about the Firebird API? Right now, I use the
IB source code in Delphi to find things, but if possible I would like
to have a documentation to know more about possible errors and how
these are returned to my application.

cu Christian