Link to the documentation concerned:

http://qt.nokia.com/doc/4.6/accessible.html#implementing-interface-factories

The example says:

QAccessibleInterface *sliderFactory(const QString &classname, QObject *object)

{ QAccessibleInterface *interface = 0; if (classname == "QSlider" && object && object->isWidgetType()) interface = new SliderInterface(classname, static_cast<QWidget *>(object)); return interface; }

Issue: it should not be "SliderInterface" but "AccessibleSlider" and causes confusion.