You create a user class, define its attributes, and optionally declare and define its methods and superclass in the Class Editor of the OpenROAD Workbench. For instructions to create a user class, see the Workbench User Guide.

When you define attributes, you specify:

When you define methods, you specify:

The data type of an attribute or method can be either a simple data type or a class, including another user class. If a user class is defined as the data type, the user class must exist at the time the attribute or method is created.

You define all of a user class's methods in a single 4GL script that is part of the user class source object. Any operations that can be performed syntactically in the 4GL code of a frame or procedure can be done in the 4GL code of a user class method, including invoking another of the class's methods.

Like many other OpenROAD application components, user classes can be created dynamically.