#include <QtGui/qdialogbuttonbox.h>
#ifndef QDIALOGBUTTONBOX_H
class QDialogButtonBox: public QWidget{
   /* Some contents are skipped to improve readability */
   public: enum ButtonRole{
      /* ... */
      NoRole = 6,
      /* ... */
   };
   /* ... */
};
#endif // QDIALOGBUTTONBOX_H