How to create a proc in db2/400 V7R2M0

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C#

Dear Sir,
Let me known that How to crate a Store Procedure in db2/400 V7R2M0 for
Select records in table. and how to use this store Procedure in MVC application. pls guide me.

Thanks.
Daulat Singh.

What I have tried:

create procedure QGPL.PP4(IN a# INT,OUT b# Varchar(35))
Language SQL
BEGIN
select HDSUBJ into b# from ERPLXUSRF.KHDS where HDINNO=a#;
END

Test with On IBM iseries Navigator :
call QGPL.PP4(10,?)

But Can't Apply with MVC Application.