How to get program name which run BDC.

Hii ,

I have z program which is used for FI posting and clearing in that program for posting and clearing i used BDC call by transaction with - no screen mode

i.e ctu parameterv_: ctu_params-nobinpt = 'X'.
ctu_params-dismode = 'Q'.
ctu_params-updmode = 'L'.

when this program run bdc control goes to program SAPMF05A i.e f-28 program , NOW I WANT TO GET my z program name in this program how can i get this ???? because sy-cprog , sy-repid contain running program name how can i get my z program name ??? any other way such as set flag or field ?????