# Reference Documentation

The Qt API:

- Alphabetical Class List
- Annotated Class List
- Structure Overview
- Inheritance Hierarchy
- Alphabetical Function Index (long)
- Header File Index
- Widget Screenshots

Using Qt:

- Tutorial
- Example Programs
- Introduction to Signals and Slots
- Using the Meta Object Compiler (moc)
- Debugging Techniques

Qt Extensions:

- OpenGL 3D Graphics Support
- Netscape/Explorer Plugin Support
- Image File Formats Support
- Xt/Motif Legacy Code Support

Further Information:

- Troll Tech Contact Information
- Qt Mailing Lists
- Credits
- Developers' Homepage [external]

## About Qt

Qt`TM` is a multi-platform C++ GUI toolkit. It is a product of Troll Tech. It is supported on all major variants of Microsoft Windows and Unix/X Windows.

Qt Professional Edition is provided for commercial software development. It is provided with upgrades and technical support. For the latest prices, please see the Troll Tech web site, Pricing and Availability page, or contact sales@troll.no.

Qt Free Edition is the Unix/X11 version of Qt available for development of free software only. It is provided free of charge under the Qt Free Edition License. The latest version is available for download.