Manual De Progress

Purpose
The Progress Language Reference defines the Progress 4GL. It covers all 4GL statements,
functions, phrases, operators, preprocessor directives, special symbols, widgets, handles,attributes, methods, and events.
Audience
This book is intended for programmers who develop applications using Progress and for anyone
who needs to read and understand Progress 4GL code.
Organization ofThis Manual
The Progress Language Reference contains three volumes.
Volume I (Syntax A-F) and Volume II (Syntax G-Z) comprise a dictionary of Progress
statements, functions, phrases, operators,preprocessors, and special symbols.
Volume III (Widgets, Handles, Attributes & Methods, Events, & Indexes) contains:
• A dictionary of Progress widgets
• A dictionary of Progress handles
• A dictionaryof Progress attributes and methods
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• Tables of Progress events organized as follows:
– Keyboard events
– Mouse events
– High level widget events
– Directmanipulation events
– Developer events
• An index to the Progress 4GL by keyword
• An index to the entire Progress Language Reference
How to Use This Manual
The explanation of each statement,function, and phrase includes:
• Platform-restrictions, in the form of a table or individual notes
• A purpose or description of the language element
• Block properties for all block statements
• Datamovement diagrams for all data handling statements
• The syntax for the element.
• The options and arguments you can use with the statement, phrase, or operator
• One or more examples that illustratethe use of the element
• Notes that highlight special cases or provide hints on using the element
• A See Also section that list other related language elements
Some elements and features of theProgress 4GL do not apply to all software
platforms—operating systems, user interfaces, and database management systems—that
Progress supports. The documentation tries to note each such platform...