vf01 or vf02 transfer to accounting document

Hello, everyone, I want to find a customer exit or badi or other enhancement that achieve the FI account document when billing document transfer to accounting document via push the button ''transfer to accounting''  in VF02 or VFX3 ,  that is to say, I want to do something according to the accounting document  please help me, thanks,  additional, the FI substitute as if doesn't work ,   thanks.