Using destinations in ABAP

Hey,
I would like to create a BAPI that sends his data to XI through a destination.
Every example I found is just acting as wrapper:
CALL FUNCTION 'ZBAPI_PO_SEND_RESP_XI_ASYNC'
in background task
destination 'RFC2XR3'
exporting
PO_NUMBER = PURCHASEORDER
VENDOR_NUMBER = PO_HEADER-VENDOR.
commit work.
How can I send the data directly?
thx
chris

Hi
http://help.sap.com/saphelp_nw70/helpdata/en/e4/2adbd7449911d1949c0000e8353423/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb2d74358411d1829f0000e829fbfe/content.htm

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