I have attached a small simple document how to create barcodes that can simulate keys of a Keyboard.
For whatever reason we don;t seem to have these kind of documents
3 basic rules to let this work:
1. Create the barcode in Code 39 regular
2. Configure the scanner to read Code 39 Full ASCII
3. Enter the right code which you can find in the scanner manuals. Look ASCII Character Set table. For example Appendix H, Table H1 in the DS4308 PRG: https://atgsupportcentral.motorolasolutions.com/content/emb/docs/manuals/%20MN000327A01a.pdf
You can use a tool like Filmbar Graphics to create your barcodes: http://filmbars-graphics.software.informer.com/3.2/