Output Param Of Stored Proc - Oledb Command

Hello

This is my first post so please be gentle!!

I have a stored proc that returns a value:



set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
SET NOCOUNT ON

GO
-- =============================================
ALTER PROCEDURE [dbo].[spPK]
-- Add the parameters for the stored procedure here
@varNSC varchar(4),
@varNC varchar(2),
@varIIN varchar(7),
@varIMCDMC varchar(8),
@varOut as int output
AS
Declare
@varPK int
set @varPK = 0
BEGIN

--This checks Method 1
--NSC = @varNSC
--NC = @varNC
--IIN = @varIIN
begin
if exists
(select Item_id
From Item
Where NSC = @varNSC
and NC = @varNC
and IIN = @varIIN)
set @varPK =
(select Item_id
From Item
Where NSC = @varNSC
and NC = @varNC
and IIN = @varIIN)
set @varOut = @varPK
if @varPK <> 0 Return
end

[There are some more methods here]

Return

END



How do I get at the output value?

I have tried using derived column and ole db command but can't seem to grasp how to pass the value to the derived column. I can get oledb command to run using 'exec dbo.spPK ?, ?, ?, ?, ? output' but don't know what to do from here.