Displays a brief message, an icon, and some buttons. ... QMessageBox  ( QWidget * parent=0, const char * name=0 )  . QMessageBox  ( const char * caption, const char * text, Icon icon, int button0, int button1, int button2, QWidget * parent=0, const char * name=0, bool modal=TRUE, WFlags f=0 )  . QMessageBox  ()  . ... A message box is a modal dialog that displays an icon, a text and up to three push buttons. ... Constructs a message box with a caption, a text, an icon and up to three buttons. ...