BAPI for change sales order

Hi all,

I would like to change the quantities and items in a sales order from my ABAP program in simulation mode.

I tried to use the BAPI_SALESDOCUMENT_CHANGE but this BAPI doesn't have the exit structures. I need to change my sales order in simulation mode and show the results to user. I don't want to commit the changes, I would like simulate changes.

How I can fetch the results of this simulation?

Thanks in advance,

Francesca