#include <qmainwindow.h>#include <qmessagebox.h>#include <qpopupmenu.h>#include <qmenubar.h>#include <qpushbutton.h>#include <qapplication.h>#ifndef _MY_WIDGET_H#define _MY_WIDGET_Hclass MyMainWindow: public QMainWindow {	// All classes that contain signals or slots	// must mention Q_OBJECT in their declaration.	Q_OBJECT	public:	MyMainWindow(QWidget* parent = 0, const char* name = 0);	// user defined slots	public slots:	void OnTesting();	void OnExit();	void OnAbout();	private:	// build the menu	void CreateMenu();	QPushButton* buttonExit;};#endif