BUS2012 - get purchase order items (GetItems)

Hi,

How can I get the purchase order items as attribute in the business

object BUS2012 (Purchase Order). I already found the function GetItems

in BUS2012 which returns all POItems. So how can I use this function

to get all purchase order items in an BO attribute if an certain event

happens.

Thx 4 answer!

BR, René