OriginNum(SalesOrderNr) as automatic parameter

SELECT 
T3.ItemName, *

From WOR1 T0 
inner join OWOR T1 ON T0.DocEntry = T1.DocEntry 
inner join OITM T3 ON T1.ItemCode = T3.ItemCode
left outer join OCRD T2 ON T1.CardCode = T2.CardCode

where 
T1.OriginNum=' [%OriginNum]' 

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Furthermore i have created a parameter on the field OriginNum; which is the same as the sales order's field docnum. This is the problem: "Because there can be more than one production orders linked to the sales order and i need to print the lay-out in the production order entry screen, i can't use the parameters from the MarketingDocumentDIN lay-out to get the current sales order number(OriginNum). Is there a way to enter a code in the Design Param SQL to get the sales order number(OriginNum) from the screen?

Please help?
Martin Cerasuolo
Solution:
Fill in the id of the OriginNum in the parameter menu!