What are
system objects?
System objects
PowerBuilder system class objects are the built-in objects you use
to develop your application. PowerBuilder system objects include objects
such as windows and menus, as well as graphical controls and predefined
entities that you can reference in your application, such as the Message
and Error objects.
Controls
PowerBuilder controls are a subset of system objects that you place
in windows or user objects. Typically, they are graphical objects that
allow users to interact with your application or that you use to enhance
the design of your windows.
System structures
PowerBuilder system structures are a subset of system objects that
contain properties that describe the state of other system objects or the
system itself. For example, the Environment object is a structure that
holds information about the computing platform the PowerBuilder
Application object is running on.