The scanner is no more that a keyboard. When you scan a barcode, it's just like typing in (let' say) 10 keys. The only requirement is a set of fonts you need to install on your system. So to display the scanned item in a textbox, you will set the Font of that textbox to whichever font your scanner uses.
Some fonts: (not free)
Code 39
Code 128
Code 93
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