Here are the classes, structs, unions and interfaces with brief descriptions:

CFilePath	A custom type that represents a file path (is a QString)
CGenericSettingsGroupWidgetFactory	`[INTERNAL USE]` Generic base class for a factory to create QSettingsWidgets
CGenericSettingsWidgetFactory	`[INTERNAL USE]` Generic base class for a factory to create QSettingsWidgets
CHtmlText	A custom type that represents html-text (is a QString)
CIntRange	A custom type that represents an integer range (is an int)
CInvalidContainerPathException	An exception that will be thrown if an invalid container path is used
CInvalidTargetLayoutException	An exception that is thrown if you try to add an element to a QSettingsLayout that does not accept this kind of element
CLayoutPropertyNotDefinedException	An exception that indicates you are trying to access an undefined property in a QSettingsLayout
CQAsyncSettingsContainer	A special class that allows access to the settings dialog from different threads
CQAsyncSettingsLoader	Defines an asynchronous loader, that can load settings from any thread with any delay
CQGroupSettingsContainer	A settings container for groups
CQSectionSettingsContainer	A settings container for sections
CQSettingsContainer	A generic class the defines methods for settings containers
CQSettingsDialog	The main class that represents the dialog itself
CQSettingsDialogWidget	A generic class to easily create a dialog widget from a normal one
CQSettingsDialogWidgetBase	The base class for dialog based edit widgets in the settings dialog
CQSettingsDisplayEngine	`[INTERNAL USE]` An interface for an engine to create display dialogs
CQSettingsDisplayInstance	`[INTERNAL USE]` An interface for a display instance that can be controlled by the dialog
CQSettingsEntry	Represents one settings entry within the settings dialog
CQSettingsGroupWidget	Generic base class for group widgets
CQSettingsGroupWidgetBase	The base class for group widgets in the settings dialog
CQSettingsGroupWidgetFactory	The base class for a factory to create QSettingsGroupWidgets
CQSettingsLayout	A general class to modifiy the appereance of elements of a settings dialog
CQSettingsLoader	The basic settings loader class. Serves as utility class
CQSettingsLoaderEntry	A combination of a QSettingsEntry and a QSimpleSettingsLoader in one class
CQSettingsPropertyEntry	A class that combines the QSettingsEntry and the QSettingsPropertyLoader
CQSettingsPropertyLoader	A loader to load properties from objects and gadgets
CQSettingsSettingsLoader	A loader to load data from QSettings
CQSettingsWidget	Generic base class for settings widgets
CQSettingsWidgetBase	The base class for edit widgets in the settings dialog
CQSettingsWidgetDialogEngine	The default engine implementation for the settings dialog
CQSettingsWidgetFactory	The base class for a factory to create QSettingsWidgets
CQSettingsWidgetFactoryRegistry	A registry to load widget factories based on an id
CQSimpleSettingsLoader	Defines a simple, synchronous loader
CQtException	A basic exception type for Qt Exceptions
CVariantWidgetsRegistrator	A static class to globally register different types of edit widgets