Dear Experts

I have a textbox1 which gets input from Barcode scanner.
I want this textbox not to accept input from keyboard.

Background:

I scan barcodes of new products and save in database.
Some times user enters some wrong data into this textbox and save it in db.
I want to block user to input any data in said textbox to ensure correct data is being entered.

While googling I found this link similar to my problem
https://stackoverflow.com/questions/50464858/allow-only-barcode-scanner-and-eliminate-keyboard-input?noredirect=1&lq=1

But do no know how to make procedures workable in VFP.

Please help