Thank you very much for your help. I works well now.





--- In firebird-support@yahoogroups.com, "Ivan Prenosil"
<Ivan.Prenosil@...> wrote:

>
> > DLLIMPORT int addfunc( int a, int b )
> > {
> > return a + b;
> > }
> >
> > testdll.sql
> >
> > DECLARE EXTERNAL FUNCTION addfunc
> > INTEGER, INTEGER
> > RETURNS INTEGER
> > ENTRY_POINT 'addfunc' MODULE_NAME 'testdll';
>
> Input parameters are always passed as pointers to values.
> Output value is also passed using pointer,
> unless you specify RETURNS INTEGER BY VALUE
> (can be used only for simple types, not Timestamp, Varchar, ...)
>
> Ivan
> http://www.volny.cz/iprenosil/interbase/
>