BAPI or FM to create Bonus Buy

Hi ,

Requirement:  I need to create promotion and bonus buy depending on uploaded excel file.

Status:

               Used BAPI " BAPI_PROMO_CREATE " to create promotion. Promotion successfully created but bonus buy is not created.

Need help:

    Please comment if you know any BAPI or FM to create BONUS BUY 

    Can "BAPI_PROMO_CREATE" create bonus buy ,if so please specify which table needs to be filled in BAPI?