device from NSEvent

I have an application that uses a barcode scanner. I want to be able to determine who pressed a key: the keyboard or the barcode scanner. I tried all the methods from the N开发者_开发知识库SEvent, but I didn't find anything.

Thanks

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You cant get device information using NSEvent.You shoud take a look at DDHidLib. It will help you to work with usb devices.