Detect which of multiple keyboards

[sancarn]

It would be really useful if we could attatch which keyboard the keyboard event came from to the event as this would open up a lot of possibilities.

It appears that this is described here

1. Register the devices you want to use for raw input (the two keyboards) with ::RegisterRawInputDevices().
2. You can get these devices from GetRawInputDeviceList()
3. After you've registered your devices, you will start getting WM_INPUT messages.
4. The lParam of the WM_INPUT message contains a RAWKEYBOARD structure that you can use to determine the keyboard where the input came from, plus the virtual keycode and the type of message (WM_KEYDOWN, WM_KEYUP, ...)
5. So you can set a flag of where the last message came from and then dispatch it to the regular keyboard input handlers.