#include <QtGui>
#include <QtWidgets>

int main(int argc, char * argv[])
{
	QApplication app(argc, argv);

	QMainWindow* mw = new QMainWindow(0);
	mw->setWindowTitle(QLatin1String("Main"));
	mw->resize(400, 300);
	mw->move(100, 100);
	mw->show();

	QDialog* d = new QDialog(mw, Qt::Window);
	d->setWindowTitle(QLatin1String("Modeless"));
	d->resize(200, 100);
	d->show();
    return app.exec();
}