User-Exit n transaction VF24 billing due list

Hi All,

I am creating billing doc from VF04, using Delivery document as

SD Document in VF04 Selection screen.

My question: I want to prevent some of the delivery doc to create billing due list.

Example: I am creating billing doc from VF04 by using delivery 80131567

( Just for exampel) If this delivery's sales order type is = 'ZSKE' then only

i have to allow the system to create billing due list other wise no billing

due will be created.

I hope you got clear idea abt the issue from my example.

Could you please let me know any perfect USER-EXIT exit or Routne

and any thing to work my scenario.

I would really appreciate if you give the right and prompt response...

Thx