HOW TO USE BAPI BAPI_BILLINGDOC_CREATEMULTIPLE

HI ALL:

I want to create billing num. in t-code 'VF01'. It is just to input a delivery num.

then press zhe 'save' button.

How to use the bapi BAPI_BILLINGDOC_CREATEMULTIPLE, I mean which

variable should be given. Is there any examples.

THANKS FIRST.