This example shows how to create mother and child widgets. ... Qt tutorial 3 ** ****************************************************************/ # include qapplication.h # include qpushbutton .h # include qfont.h int main( int argc, char **argv ) { QApplication a( argc, argv ); QWidget w; w. resize ( 200, 120 ); QPushButton quit ( Quit , w ); quit . move ( 62, 40 ); quit . resize ( 75, 30 ); QWidget w; . ... QPushButton quit( "Quit", &w ); . A child is born. ...