If you want to add customer-specific checks to CATS notebook, you must implement the checkRecord method of the ITimeSheetChecker interface. The following parameters are transferred to the method:

1. One of the following four operations, which are defined in the ITimeSheetChecker interface: CHECK, DELETE, INSERT, UPDATE
2. A data record that is contained in an instance of the IRecordReadOnly category.
3. An object that is contained in an instance of the ITimeSheetReader category. This object enables you to access to general data and transaction data (such as an order number, for example).

For more information on the checkRecord method, see the relevant API documentation.