#include <QtGui/qabstractslider.h>
#ifndef QABSTRACTSLIDER_H
class QAbstractSlider: public QWidget{
   /* Some contents are skipped to improve readability */
#ifndef QT_NO_WHEELEVENT
   protected: virtual void wheelEvent(struct QWheelEvent* e);
#endif
   /* ... */
};
#endif // QABSTRACTSLIDER_H