Deleting item componente while REM Backflush

Hey guys,

I want to find a function BADi or similar in order to take off automatically ítems-components while Backflush.

Any abap example??.

Other posibility could be, make bulk material or put blank quantities while backflush. I do not stablish bulk material in advance, only avoid some choosen by abap were backflushed while MFBF BOM explosión.

Thanks a lot.