To scan bar codes drag and drop Universal Form tab/button and add Bar Code input from Fields section. You can change the size of the input. Save the app. When previewing the app on a device tap on the bar code sign and scan the bar code you need. Once scanned it will allow you to submit the form with the bar code image in the email/pdf or spreadsheet mode depending on your choice.
To see characters/value of the scanned Bar Code you may add a Text/Number input from Field Section and specify the name of your Bar Code element in the Formula – see more in our User Manual