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

* Extension classes of ActiveQt, Motif, and Netscape.