#include <QtWidgets>

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

    QSpinBox * spinBox = new QSpinBox();
    spinBox->setSpecialValueText("Special Value Text");
    QSpinBox * spinBox2 = new QSpinBox();
    spinBox2->setSpecialValueText("Special Value Text 2");

    QVBoxLayout * layout = new QVBoxLayout();
    layout->addWidget(spinBox);
    layout->addWidget(spinBox2);
    window.setLayout(layout);

    window.show();
    spinBox->show();
    return app.exec();
}