如何调用oracle的package并得到返回值

[shensean08]

我想调用package里的nlp000u函数并得到返回值
是用datareader吗，command的sql怎么写
谢谢

PACKAGE如下

CREATE OR REPLACE PACKAGE NLP000P is
FUNCTION NLP000U (
PARA_ID INTEGER
,PARA_DESC CHAR) RETURN number;
END NLP000P;

create or replace package body NLP000P is

FUNCTION NLP000U (
PARA_ID INTEGER
,PARA_DESC CHAR) RETURN number
is
BEGIN
return 0;
END NLP000U;
end NLP000P;