How Can I Find Value is Come From Keyboard or Barcoder Reader in VB.NT

How Can I Find Value is Come From Keyboard or Barcoder Reader in VB.NET

I Have a Windows Application in VB.NET . I want to know the value is entered user is
coming from BARCODER READER OR KEYBOARD .. Because I want to store values come from
Keyboard in Different Database and Barcode values in Different Database ..
So please let me Know how to dis... or Any URLS ....