The Presentation Manager environment lends itself to the implementation of object-oriented programs under the module-based approach to object-oriented design. Presentation Manager provides far more than merely a means of displaying information on the screen. It implements an event-driven, object-based application execution environment and provides many services required for the definition and manipulation of application objects and messages.
This chapter will examine the execution environment provided by Presentation Manager, describe the structure of a Presentation Manager application, and illustrate the implementation of basic object-oriented concepts in the Presentation Manager environment.