#includeThis program creates a QLabel widget and sets its tooltip to "This is a QLabel tooltip" using the QLabel's setToolTip() function. The label's text is set to "Hover me to see a tooltip" using the setText() function. When the mouse is hovered over the label, the tooltip is displayed. The package library for Qt and QLabel is the Qt library.#include #include int main(int argc, char *argv[]) { QApplication app(argc, argv); QWidget window; QLabel *label = new QLabel(&window); label->setToolTip("This is a QLabel tooltip"); label->setText("Hover me to see a tooltip"); label->setGeometry(QRect(50, 50, 200, 50)); window.show(); return app.exec(); }