I have a customer table made up of customers of at least 2 different types. I create three classes: BaseCust, Cust1, and Cust2. For the sake of illustration the method FigureAmtDue is completely different for Cust1 and Cust2. I understand how this works in plain jane code: Create an instance of whichever class you are working with and call the method. However, how is this done on a report where I am trying to figure the total amount due for all customers? Do I create an instance of the class on the record break and subsequently destroy it only to call it again? I must be missing something in my understanding of Classes or is this the way it is actually done? I guess the same thing would apply on a grid if there is a calculated field. Someone please help me before I completely screw up a project. Thanks :)