Explanation/Reference:
Explanation:
D (not F): With subclassing you can make an exact copy, and then alter the properties of some objects if desired. If you change the parent class, the changes also apply to the properties of the subclassed object that you have not altered. However, any properties that you override remain overridden. This provides a powerful object inheritance model.
Incorrect answers:
A: A property class is a named object that contains a list of properties and their settings. You can use property classes to increase productivity and improve network performance.
Here are some of the uses of a property class:
* It increases productivity by setting standard or frequently used values for common properties and associates them with several form builder objects.
* It defines standard properties not just for one particular object but also for several at a time. This results in increased productivity, because it eliminates the time spent on setting identical properties for several objects.
* It improves network performance by increasing the efficiency of message diffing.
C: A SmartClass is a special member of an Object Library. It can be used to easily subclass existing objects in a form using the SmartClass option from the right mouse button popup menu.
E, G: When you copy an object, a separate, unique version of that object is created in the target module.
Any objects owned by the copied object also get copied. Changes made to a copied object in the source module do not affect the copied object in the target module.