[Casimiro Noteví]

Pásale el parámetro que necesites:

Código SQL [-]
CREATE PROCEDURE name 
 ( input_parameter_name < datatype>, ... ) 
RETURNS 
 ( output_parameter_name < datatype>, ... )
AS 
DECLARE VARIABLE variable_name < datatype>; 
BEGIN
  /* write your code here */ 
END^

Código SQL [-]
CREATE PROCEDURE GEN_AFILIACION ( iProvincia INTEGER )
RETURNS(
  CODIGO INTEGER)
AS
BEGIN
  Codigo = iProvincia || GEN_ID(ID_Afiliacion, 1);
END