Release 10.1A: OpenEdge Getting Started:
Object-oriented Programming

Programming with Class-based Objects

Once an instance of a class is created, you will want to access the data members and methods of the object instance. The following sections detail how to instantiate a class-based object, and how to access the data members and methods of an object instance:

Instantiating and managing class-based objects
Verifying the type and validity of an object reference
Using built-in system and object references
Assigning object references
Comparing objects
Defining and using visual objects in classes
Using preprocessor features in a class
Raising and handling error conditions
Reflection — using the Progress.Lang.Class class