You can use the ITravelExpenseEnhancement interface to display customer-specific summary lines for receipts. These customer-specific summary lines can be used to provide users with summary information for receipts.

You want to add a summary line for receipts equal to "Custom summary line". Proceed as follows:

1. Define a separate class, ZTravelExpenseEnhancement. This class must implement the ITravelExpenseEnhancement interface.
2. Implement the customizeRecord method. Use this method to define the summary for receipts if strOperation equals OP_RECEIPT_LIST_SUMMARY.