How to specify which writing object (keyboard/barcode scanner) can be used to write in textbox using C#?

Question

my question is: How can I set which input "object" will be enabled for entering text into a textbox? My case is: I'm making a program where I need to use barcode scanner, and in one form in my program I want to constraint the user so he can only write down using barcode scanner. Any ideas how to implement that?

I can see both of them from device manager (1. one is barcode scanner):

Answer 1

A barcode scanner uses the keyboard interface of the computer: ie from the point of view of your textbox, it is just another keyboard.

If you want to force your user to use the barcode scanner instead of the "normal" keyboard, you have to somehow disable the normal keyboard in that situation. I do not know how to do that.