phone as usb keyboard

[Carl Karsten]

I don't want to plug a keyboard into the phone, I want to plug the phone into a
laptop and use the phone as a 2nd keyboard.

assuming it is, the goal is to use a web cam as a bar code scanner, app on phone
uses scan data to generate "keyboard" clicks that get send to the laptop.

(no, we can't just run the software on the laptop.  all we can do is hook up an
external HID like device.)

Is this doable?

Carl K