How to get mouse position on SCREEN outside the VB form

[GPerk]

I need to be able to get the position of the mouse (or cursor) when it is outside of the program's VB form.
I have tried using Cursor.Position and display the X,Y values on the form.
But when the cursor leaves the boundaries of the Form, no values are returned.

( BTW, what is the difference between Cursor Position and Mouse.Position? )