Extracting Header fields and item fields From Excel

Hi Guru's

I am using BAPi : BAPI_SALESORDER_CREATEFORMAT2 for Data migration. My input file is Excel.

in single file they gave both header and item.

I need to split it header in to header internal table and item in to item internal table.

I am using function module to convert excel to internal table.

ALSM_EXCEL_TO_INTERNAL_TABLE

Its working fine.

How to split that header and item.

Thanks & Regards,

Meenachi