If you want the bar code scanning to be independent of where the user is on the 
UI, then there is usually a serial port emulation available on USB.
GET SERIAL PORT MAPPING is useful for this on Mac.  You can then run serial 
comms in a separate process, which is handy if (for instance) the bar code 
readers are RF and being used at a distance from the computer (which also lets 
you run multiple scanners per computer).  Or I’d guess that there must be some 
IP wifi based bar code scanners out there by now, so you could (presumably) 
simply do a TCP_Open.

Cheers!

Tony Pollard
Another Dimension Ltd




> On 24 Aug 2018, at 2:52 pm, mferguson--- via 4D_Tech <4d_tech@lists.4d.com> 
> wrote:
> 
> Hi,
> 
> I am familiar with plugins to print barcodes, but don’t know what interface 
> is needed to get 4D to read barcodes from barcode wands, etc. Does anyone 
> have advice or recommendations?
> 
> Thanks,
> 
> Michael Ferguson
> Objective Systems
> 
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