--- In firebird-support@yahoogroups.com, A6-CMO Philippe Makowski
<makowski@a...> wrote:

> I have a problem with this udf
> I declare :
> DECLARE EXTERNAL FUNCTION DPOWER
> DOUBLE PRECISION, DOUBLE PRECISION
> RETURNS DOUBLE PRECISION BY DESCRIPTOR
> ENTRY_POINT 'power' MODULE_NAME 'fbudf';
>

I found !
the right syntaxe is :
DECLARE EXTERNAL FUNCTION DPOWER
DOUBLE PRECISION BY DESCRIPTOR,
DOUBLE PRECISION BY DESCRIPTOR,
DOUBLE PRECISION BY DESCRIPTOR
RETURNS PARAMETER 3
ENTRY_POINT 'power' MODULE_NAME 'fbudf';


but I don't understand why.