#include <QtGui/qmessagebox.h> #ifndef QMESSAGEBOX_H #ifndef QT_NO_MESSAGEBOX class QMessageBox: public QDialog{ /* Some contents are skipped to improve readability */ public: enum ButtonRole{ /* ... */ RejectRole = 1, /* ... */ }; /* ... */ }; #endif // QT_NO_MESSAGEBOX #endif // QMESSAGEBOX_H