Table of Contents

Selected Object-Oriented Programming Topics

Terminology review

PowerBuilder techniques

Other techniques

Selected PowerScript Topics

Dot notation

Constant declarations

Controlling access for instance variables

Resolving naming conflicts

Return values from ancestor scripts

Types of arguments for functions and events

Ancestor and descendant variables

Optimizing expressions for DataWindow and external objects

Exception handling in PowerBuilder

Basics of exception handling

Objects for exception handling support

Handling exceptions

Creating user-defined exception types

Adding flexibility and facilitating object reuse

Using the SystemError and Error events

Garbage collection and memory management

Configuring memory management

Efficient compiling and performance

Reading and writing text or binary files

Getting Information About PowerBuilder Class Definitions

Overview of class definition information

Terminology

Who uses PowerBuilder class definitions

Examining a class definition

Getting a class definition object

Getting detailed information about the class

Getting information about a class's scripts

Getting information about variables