doc/codesnippets/doc/src/snippets/widgets-tutorial/toplevel/main.cpp


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#include <QtWidgets>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
//! [create, resize and show]
    QWidget *window = new QWidget();
    window->resize(320, 240);
    window->show();
//! [create, resize and show]
    window->setWindowTitle(tr("Top-level widget"));
    return app.exec();
}