int main(int argc, char **argv) { QApplication app(argc, argv); QVBox *topWidget = new QVBox(); QPushButton *b1 = new QPushButton("Ok", topWidget); QPushButton *b2 = new QPushButton("Defaults", topWidget); QPushButton *b3 = new QPushButton("Cancel", topWidget); app.setMainWidget(topWidget); topWidget->show(); return app.exec(); }