Screen Exit for IW32

Hi,

I have to change the main screen of IW32 and add a button adjacent to the Status and Complete(business) buttons on the screen of IW32 where a work order is changed.

I have found 2 FMs while searching for a scrreen exit under the BADI IWO10018 :

EXIT_SAPLCOIH_018 PM Order: User Fields for Order Header P

EXIT_SAPLCOIH_019 PM Order: Customer Enhancement for User

But i am not sure whether the screen number mentioned is the same as I want.

Please help me and let me know if i am using the proper screen exit.

Thanks,

Anand.