Mouse pointer position when pointer is not on winform

I'm able to get the mouse position when it is within the form. Here is my code-

private void Form1_MouseMove(object sender, MouseEventArgs e)
{
    lblXPosition.Text = MousePosition.X.ToString();
    lblYPosition.Text = MousePosition.Y.ToString();
}

But it does not work when the pointer is outside the form. Any suggestion?