How to populate custom fields for Outbound delivery header (LIKP)

Hi All,

I have added one field in the structure LIKP using APPEND structure. Now want to populate this field from a batch program. I have delivery number. Is there any API or BAPI. I already tried using the FM BAPI_OUTB_DELIVERY_CHANGE by populating the extension. Is there any another area (EXIT or BADI) where I need to change.

Thanks in advance

Subhankar