USER EXIT RELATED

Hi,

We Have an User Exit ppco0012(Production Order: Display/Change Order Head),

with two funt. modules.

EXIT_SAPLCOKO1_001 and EXIT_SAPLCOKO1_002.

The Requirement is to add a field, PLNBEZ, Which is present in AFKO and CAUFV,

into the screen of CO24.

How to Proceed, with the user exit.

Need some Guide to code the Exit to fetch the data and Display the same in CO24.

Thanks and Regards,

Ajaz