Function Module AVAILABILITY_CHECK

I am using the function module AVAILABILITY_CHECK in SAP R/3. We are also using APO with GATP. The function module AVAILABILITY_CHECK when called from a Z ABAP R/3 program goes into APO and shows the same screen as CO09 of SAP R/3.

Is there a way to influence the function module AVAILABILITY_CHECK to return the data shown in APO? Particularly structure /SAPAPO/ATPDE as an internal table back into R/3 calling program.

Alternatively, is there another APO function module that can be called remotely to return the /SAPAPO/ATPDE as an internal table?

Thanks

Etem Dolen