COPI - printing of shopfloor papers using custom selection criteria?

I need to print shopfloor papers for any existing batch of a given process order.

The standard transaction would be COPI where you can print the papers for a given process order. Now I need to change this transaction (or copy it into a new one ZCOPI or enhance it or modify it) in order to be able to first select any batch of my process order and then print the shopfloor papers using the selection criteria of that batch.

All the logic of COPI can be found in function group CODR. I already debugged the printing (relevant dynpros are 0300 and 0400) but until now I cannot guess where I could change the code to include my custom batch selection dialog.

Maybe there is another transaction or report available? We are using SAP ECC 6.0 on release 701.

I am happy for every hint where I should start searching or any experience with a similar problem.

Thank you,

Mark

Edit: Now I found FM CO_DR_PRINT_ORDER_EXTERNAL to print the papers. It does the same as Transaction COPI. But still I need to know where to change the data that is used for printouts. I think it should be hidden somewhere in FM CO_DR_PRINT_ORDER.

Edited by: Mark Teichmann on Jan 3, 2011 6:17 PM