Invoke stored function from Pro*C

I am trying to invoke a function stored on Oracle using Pro*C. However, the precompiler does not compile through. I have attached the code below:  EXEC SQL EXECUTE
 BEGIN
  :nRefNum := getRefNo(szProductCode);
 END;
 END-EXEC; getRefNo() is the function in the database. a string is passed to the function and it returns an integer.

Thanks in advance. Received on Fri Jul 08 2005 - 19:00:24 CDT