This has nothing to do with Qt.
The Joystick has to come with a driver, and possibly with a lib.
You need to look at the manufacturer site for info, or on related forums.
A quick goole returned this, for a different (not MS) USB Joystick.
I am sure if you google a bit you will find what you are looking for.
http://www.open.com.au/mikem/arduino...ick/index.html