REG BAPI_SALESORD_CHANGE

IN STRUCTURE BAPE_VBAK THE FIELD ZFIELD IS AT 79TH POSITION

AND THE SAME FIELD IN STRUCTURE BAPE_VBAKX IS AT 89 TH POSITION.

CAN'NT I UPDATE THIS FIELD THROUGH BAPI

BAPI_SALESORD_CHANGE

TO UPDATE ACUSTOM FIELD SHD BOTH THE STRUCTURE FIELD S SHOULD BE BE EXACTLY SAME .

HOW SHD I UPDATE THIS FIELD IN THIS SCENARIO.

WITH OUT EFFECTING OTHER STUFF.