help in creating new Object Link for DMS

Hi everybody,

i am trying to create an object link to a billing document (tcode: vf03, VBRK-VBELN)

by sap instructions i did this step:

"You must create two new screens with the same number for the module pools SAPLCV130 and SAPLCV140 .

The processing logic must follow that of screen 1204 in program SAPLVC130."

and this step:

Create function module OBJECT_CHECK_XXXX (XXXX = VBRK) which i have copied from OBJECT_CHECK_EQUI .

unfortunatlly i don'y know how to change my new function module as required for the new module.

have anybody has this function module ready and may send the code to me? or give some guidenece how to change the func. module according to the billing document?

Have a nice day.