Business Objects - BUS2017, BUS2012, BUS2032, LIKP

Hi,

i m new with business objects. where can i find related information about this topic? how can i customize business objects, add attributes, methods, events?

especially for the following business objects:

- BUS2017 (goods movement)

- BUS2012 (purchase order)

How can i get the order items from a purchase order?

- BUS2032 (sales order)

- LIKP (outbound delivery)

i need the business object events (methods, attributes,...) in combination with the event infrastructure (transcode swf_bam) for a business activity monitoring with sap exchange infrastructure.

Thanks 4 every hint!

BR,

René