For Vision, you have multiple approaches:
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Use the scanner in keyboard wedge mode, and arrange to have focus in the correct field before scanning.
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Use the scanner in keyboard wedge mode, but use Sepasoft's Barcode Scanner module to intercept barcodes based on a prefix, sending the result where you like.
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Use the scanner in keyboard wedge mode, but roll your own application-wide keystroke interceptor via java Swing "under the hood".
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Use the scanner in USB Serial Port emulation mode, and run a long-lived thread to monitor the serial port. Typically delivering scanned values to a Vision Client tag, from which you can bind or trigger other events.
Related discussion, with more links: