Apparently it doesn't automatically input the number drawn from the scan into every application. There's a CE program called DataWedge that is supposed to fill the gap:
http://www.barcodedatalink.com/pages/datawedge.php
I assume, though, that it's not the driver to enable the scanner that you're looking for. If the scanner is built-in or is an attachment that comes with the device, there should be a scanner driver installed already. My Wasp WPA1200s
(CE 5.0
), for example, come with a pre-installed driver that loads on startup.