How to fullscreen a QGLWidget?

I am new to OpenGL and Qt, and I am learning both simultaneously(3 days already:). I couple of years ago I did s开发者_运维百科ome exmerimenting with DirectX and I clearly remember that it was possible to make a full-screen window there. By full-screen I mean really full-screen, even without the top part where you have the close fullscreen and minimize buttons.

I have this program so far:

#include <QApplication>

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    QGLWidget w;
    w.show();
    return app.exec();
}

What should I add to it to make w full-screen?

showFullScreen()

Although I don't want to just say RTM - the Qt online documentation really is excellent.

Try:

QGLWidget w(0L,Qt::SplashScreen);
w.showFullScreen();

However, I don't remember if Qt::SplashScreen is the good flag.