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About This Reference

This chapter includes:

What you'll find in this guide

The Addon Interfaces Library Reference is intended for users who want to use the library to create addons that dynamically add functionality to applications. You can use addons to add functionality to your application without requiring redeployment of the entire application.

The new Multimedia Library uses the Addon Interfaces Library to build its interfaces. For more information about the Multimedia Library, and to see examples of interfaces implemented with the Addon Interfaces Library, see the Multimedia Developer's Guide.

This table may help you find what you need in the Addon Interfaces Library Reference:

When you want to: Go to:
Read an overview of the Addon Interfaces Library, including a step-by-step example of how to write your own interface Overview
See the list of basic API (structures and functions) that make up the Addon Interface Library, and a list of auxilliary interface-specific functions Addon Interfaces Library Reference
See a list of existing interfaces that have been designed for use with the Addon Interfaces Library, which you can use in your applications Appendix A: Existing Interfaces
Read about accessing data (resources) in an addon using the AOResourceAcces interface Appendix B: Using Addon Resources
See the list of existing structures that have been designed for use with the Addon Interfaces Library, which you can use in your applications Appendix C: Defined Structures

Typographical conventions

Throughout this manual, we use certain typographical conventions to distinguish technical terms. In general, the conventions we use conform to those found in IEEE POSIX publications. The following table summarizes our conventions:

Reference Example
Code examples if( stream == NULL )
Command options -lR
Commands make
Environment variables PATH
File and pathnames /dev/null
Function names exit()
Keyboard chords Ctrl-Alt-Delete
Keyboard input something you type
Keyboard keys Enter
Program output login:
Programming constants NULL
Programming data types unsigned short
Programming literals 0xFF, "message string"
Variable names stdin
User-interface components Cancel

We use an arrow (→) in directions for accessing menu items, like this:

You'll find the Other... menu item under Perspective-->Show View.

We use notes, cautions, and warnings to highlight important messages:


Note: Notes point out something important or useful.


Caution: Cautions tell you about commands or procedures that may have unwanted or undesirable side effects.


WARNING: Warnings tell you about commands or procedures that could be dangerous to your files, your hardware, or even yourself.

Note to Windows users

In our documentation, we use a forward slash (/) as a delimiter in all pathnames, including those pointing to Windows files.

We also generally follow POSIX/UNIX filesystem conventions.

Navigation buttons

At the top and bottom of our HTML docs, you'll see some or all of these buttons:

Use this button: To move:
Previous To the previous part of the document.
Contents “Up” in the document:
  • In a prose book, this typically takes you to About This Guide.
  • In a reference book, it takes you to the listing of items that start with a given letter. For example, if you're looking at the docs for abs(), this button takes you to the listing of the functions that start with A.
Keyword index To the keyword index.
Next To the next part of the document.

Technical support

To obtain technical support for any QNX product, visit the Support + Services area on our website (www.qnx.com). You'll find a wide range of support options, including community forums.

Copyright © QNX Software Systems. 2009. All rights reserved.


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