Retrieve Voucher ID values from component interface

Hi,

We have a custom app engine program that utilizes a voucher component interface to create vouchers. The data for creating the vouchers are obtained from a custom staging table.

One of our goals is to be able to write the voucher ID values back to the staging table's relevant rows once the vouchers are created via the component interface. Any recommendation in regards to how this can be done would be appreciated.

Thanks.