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# Class and Function Documentation

Links to indexes and lists for finding class and function reference documentation.

### Class Lists

All Qt Classes (main index) | If you know the name of the class you want, find it here.
All Qt Modules | Qt 4 comprises several modules. Each module is a separate library.
All Qt Namespaces | A Qt namespace contains enum types, functions, and sometimes classes.
Annotated Class List | If you don't know the name of the class you want, but you know what the class should do, you might try looking here.
Groups Of Related Classes | If you know what kind of class you want (GUI, painting, I.O, etc), look here.
Inheritance Hierarchy | The C++ class inheritance hierarchy for all classes in the Qt API.
Obsolete Classes | These classes are obsolete and should not be used in new code.
Qt Full Framework Edition | The list of Qt classes included in the Full Framework Edition.
Qt GUI Framework Edition | The list of Qt classes included in the GUI Framework Edition.
Qt3 Support Classes | These classes ease the porting of code from Qt 3 to Qt 4.

### Function Lists

All Functions (main index) | All documented Qt functions listed alphabetically with a link to where each one is declared.
Endian Conversion Functions | The <QtEndian> header provides functions to convert between little and big endian representations of numbers.
Generic Algorithms | The <QtAlgorithms> header includes the generic, template-based algorithms.
Global Qt Declarations | The <QtGlobal> header file includes the fundamental global declarations. It is included by most other Qt header files.
Platform-Specific Functions | Exported functions for fine tuning Qt applications.