using BAPI_INCOMINGINVOICE_CREATE with custom field
we are using BAPI_INCOMINGINVOICE_CREATE to upload some invoices.
The problem is that we have amended the BSEG table by adding a custom filed for capturing some information (e.g BSEG-ZFIELD).
Is it possible somehow to enhance this BAPI to populate this custom field in the BSEG table, e.g.
1) append structure to the parameter BAPI_INCINV_CREATE_ACCOUNT
2) find an exit in the BAPI to map BAPI_INCINV_CREATE_ACCOUNT-ZFIELD to BSEG-ZFIELD?
any advise would be appreciated