QStatusTipEvent Class Reference
[QtGui module]

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     QWidget *myWidget = new QWidget;
     myWidget->setStatusTip(tr("This is my widget."));

     setCentralWidget(myWidget);
     ...
 }

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     QMenu *fileMenu = menuBar()->addMenu(tr("File"));

     QAction *newAct = new QAction(tr("&New"), this);
     newAct->setStatusTip(tr("Create a new file."));
     fileMenu->addAction(newAct);
     ...
 }