I know if you want to create a shipment(1) or a shipment invoice(3) you use taPopRcptHdrInsert for the header.
if you have to create an invoice(2) you use taPopEnterMatchInvHdr.
What if I want to create a return(4), (5), (6), (7)? Is there an econnect sproc for that and what is the best way to see if a screen has an econ sproc for it?