FM for blocking customer like VD05

Hi gurus,

I need to create a Z transaction for blocking customer in KNA1, in the same way that VD05.

I've been looking through the system (EC 6.0) and I did`t found nothing useful.

I also thouthg about do this with a Batch Input, becasue that process looks so easy; but that is my last resource.

Some ideas?

Thanks in advance.