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

* Extension classes of Netscape.