IHi Virender,
I don´t think you can create new methods.
There are 4 methods:
N – New order created [New]
C – Order changed [Changed]
D – Order deleted or partially deleted [Delete]
R – Complete order deleted [Removed]
Please read the following document about Change Pointer:
Processing Change Pointers - Integration via APO Core Interface (CIF) - SAP Library
Read SAP note about CIF and Change Pointer administration.
Kind Regards,
Mariano