For driver building thiers 2 places to go.WHQL and http://www.osr.com
osr could/can be found at microsoft WHQL,also,one of thier recent projects
has been USB-FX2 you can find all kinds of info on usb at web site,you'll
need
to get registered first but thats easy.

"Dave Rudolf" wrote:

> Hey all,
>
> Some friends of mine are building a simple USB device for a class project.
> They want to create a random number generator that interfaces with a Windows
> machine via a USB connection. They asked for my help because I am the friendly
> neighbourhood computer nerd, though I confess that I don't know much about USB.
>
> They want to be able to use some existing USB drivers that are built into
> relatively new versions of Windows. They figure that they could treat the
> device as a mass storage device and "read" it like a file, but I suspect that
> there is some easier interface that they could use just to send a sequence of
> numbers for each request. So, if you can, please point us in the right direction.
>
> Thanks.
>
> Dave
>