#include <QtGui/qdialogbuttonbox.h>
#ifndef QDIALOGBUTTONBOX_H
class QDialogButtonBox: public QWidget{
   /* Some contents are skipped to improve readability */
   public: enum QDialogButtonBox::ButtonRole buttonRole(struct QAbstractButton* button) const
   /* ... */
};
#endif // QDIALOGBUTTONBOX_H