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Qt's Classes

For a shorter list that only includes the most frequently used classes, see Qt's Main Classes.

A	QAccel		QDictIterator		QIconViewItem		QPlatinumStyle		QTabBar
	QAccessible		QDir		QImage		QPNGImagePacker		QTabDialog
	QAccessibleInterface		QDirectPainter		QImageConsumer		QPoint		QTable
	QAccessibleObject		QDns		QImageDecoder		QPointArray		QTableItem
	QAction		QDockArea		QImageDrag		QPopupMenu		QTableSelection
	QActionGroup		QDockWindow		QImageFormat		QPrinter		QTabletEvent
	QApplication		QDomAttr		QImageFormatPlugin		QProcess		QTabWidget
	QAquaStyle		QDomCDATASection		QImageFormatType		QProgressBar		QTextBrowser
	QAsciiCache		QDomCharacterData		QImageIO		QProgressDialog		QTextCodec
	QAsciiCacheIterator		QDomComment		QIMEvent		QPtrCollection		QTextCodecPlugin
	QAsciiDict		QDomDocument		QInputDialog		QPtrDict		QTextDecoder
	QAsciiDictIterator		QDomDocumentFragment		QIntCache		QPtrDictIterator		QTextDrag
	QAssistantClient		QDomDocumentType		QIntCacheIterator		QPtrList		QTextEdit
	QAxAggregated *		QDomElement		QIntDict		QPtrListIterator		QTextEncoder
	QAxBase *		QDomEntity		QIntDictIterator		QPtrQueue		QTextIStream
	QAxBindable *		QDomEntityReference		QIntValidator		QPtrStack		QTextOStream
	QAxFactory *		QDomImplementation		QIODevice		QPtrVector		QTextStream
	QAxObject *		QDomNamedNodeMap	J	QJisCodec		QPushButton		QThread
	QAxWidget *		QDomNode	K	QKbdDriverFactory	R	QRadioButton		QThreadStorage
B	QBig5Codec		QDomNodeList		QKbdDriverPlugin		QRangeControl		QTime
	QBig5hkscsCodec		QDomNotation		QKeyEvent		QRect		QTimeEdit
	QBitArray		QDomProcessingInstruction		QKeySequence		QRegExp		QTimer
	QBitmap		QDomText	L	QLabel		QRegExpValidator		QTimerEvent
	QBitVal		QDoubleValidator		QLayout		QRegion		QToolBar
	QBoxLayout		QDragEnterEvent		QLayoutItem		QResizeEvent		QToolBox
	QBrush		QDragLeaveEvent		QLayoutIterator	S	QScreen		QToolButton
	QBuffer		QDragMoveEvent		QLCDNumber		QScrollBar		QToolTip
	QButton		QDragObject		QLibrary		QScrollView		QToolTipGroup
	QButtonGroup		QDropEvent		QLineEdit		QSemaphore		QTranslator
	QByteArray	E	QEditorFactory		QListBox		QServerSocket		QTranslatorMessage
C	QCache		QErrorMessage		QListBoxItem		QSessionManager		QTsciiCodec
	QCacheIterator		QEucJpCodec		QListBoxPixmap		QSettings	U	QUriDrag
	QCanvas		QEucKrCodec		QListBoxText		QSGIStyle		QUrl
	QCanvasEllipse		QEvent		QListView		QShowEvent		QUrlInfo
	QCanvasItem		QEventLoop		QListViewItem		QSignal		QUrlOperator
	QCanvasItemList	F	QFile		QListViewItemIterator		QSignalMapper		QUuid
	QCanvasLine		QFileDialog		QLocalFs		QSimpleRichText	V	QValidator
	QCanvasPixmap		QFileIconProvider	M	QMacMime		QSize		QValueList
	QCanvasPixmapArray		QFileInfo		QMacStyle		QSizeGrip		QValueListConstIterator
	QCanvasPolygon		QFilePreview		QMainWindow		QSizePolicy		QValueListIterator
	QCanvasPolygonalItem		QFocusData		QMap		QSjisCodec		QValueStack
	QCanvasRectangle		QFocusEvent		QMapConstIterator		QSlider		QValueVector
	QCanvasSpline		QFont		QMapIterator		QSocket		QVariant
	QCanvasSprite		QFontDatabase		QMemArray		QSocketDevice		QVBox
	QCanvasText		QFontDialog		QMenuBar		QSocketNotifier		QVBoxLayout
	QCanvasView		QFontInfo		QMenuData		QSound		QVButtonGroup
	QCDEStyle		QFontManager		QMessageBox		QSpacerItem		QVGroupBox
	QChar		QFontMetrics		QMetaObject		QSpinBox	W	QWaitCondition
	QCharRef		QFrame		QMetaProperty		QSplashScreen		QWhatsThis
	QCheckBox		QFtp		QMimeSource		QSplitter		QWheelEvent
	QCheckListItem	G	QGb18030Codec		QMimeSourceFactory		QSql		QWidget
	QCheckTableItem		QGb2312Codec		QMotif *		QSqlCursor		QWidgetFactory
	QChildEvent		QGbkCodec		QMotifDialog *		QSqlDatabase		QWidgetItem
	QClipboard		QGfxDriverFactory		QMotifPlusStyle		QSqlDriver		QWidgetPlugin
	QCloseEvent		QGfxDriverPlugin		QMotifStyle		QSqlDriverPlugin		QWidgetStack
	QColor		QGL		QMotifWidget *		QSqlEditorFactory		QWindowsMime
	QColorDialog		QGLayoutIterator		QMouseDriverFactory		QSqlError		QWindowsStyle
	QColorDrag		QGLColormap		QMouseDriverPlugin		QSqlField		QWindowsXPStyle
	QColorGroup		QGLContext		QMouseEvent		QSqlFieldInfo		QWizard
	QComboBox		QGLFormat		QMoveEvent		QSqlForm		QWMatrix
	QComboTableItem		QGLWidget		QMovie		QSqlIndex		QWorkspace
	QCommonStyle		QGrid		QMutex		QSqlPropertyMap		QWSDecoration
	QConstString		QGridLayout		QMutexLocker		QSqlQuery		QWSInputMethod
	QContextMenuEvent		QGridView	N	QNetworkOperation		QSqlRecord		QWSKeyboardHandler
	QCopChannel		QGroupBox		QNetworkProtocol		QSqlRecordInfo		QWSMouseHandler
	QCString		QGuardedPtr		QNPInstance *		QSqlResult		QWSServer
	QCursor	H	QHBox		QNPlugin *		QSqlSelectCursor		QWSWindow
	QCustomEvent		QHBoxLayout		QNPStream *		QStatusBar	X	QXmlAttributes
	QCustomMenuItem		QHButtonGroup		QNPWidget *		QStoredDrag		QXmlContentHandler
D	QDataBrowser		QHeader	O	QObject		QStrIList		QXmlDeclHandler
	QDataStream		QHebrewCodec		QObjectCleanupHandler		QString		QXmlDefaultHandler
	QDataTable		QHGroupBox		QObjectList		QStringList		QXmlDTDHandler
	QDataView		QHideEvent		QObjectListIterator		QStrList		QXmlEntityResolver
	QDate		QHostAddress	P	QPaintDevice		QStrListIterator		QXmlErrorHandler
	QDateEdit		QHttp		QPaintDeviceMetrics		QStyle		QXmlInputSource
	QDateTime		QHttpHeader		QPainter		QStyleFactory		QXmlLexicalHandler
	QDateTimeEdit		QHttpRequestHeader		QPaintEvent		QStyleOption		QXmlLocator
	QDateTimeEditBase		QHttpResponseHeader		QPair		QStylePlugin		QXmlNamespaceSupport
	QDeepCopy	I	QIconDrag		QPalette		QStyleSheet		QXmlParseException
	QDesktopWidget		QIconDragItem		QPen		QStyleSheetItem		QXmlReader
	QDial		QIconFactory		QPicture		QSyntaxHighlighter		QXmlSimpleReader
	QDialog		QIconSet		QPixmap	T	Qt
	QDict		QIconView		QPixmapCache		QTab

* Extension classes of ActiveQt, Motif, and Netscape.