I have an SLE which accepts data from a barcode scanner. This data includes
control-characters to designate the start, and completion of the datastream.
Unfortunately, when the SLE receives any control character it beeps. I am
trapping specific keys in the keypressed event, but even these will beep
suggesting that it is issued prior to my receipt of the event.

Why is this? Is there anyway to tell PB to 'cut it out'?

For reference, this is PB 11.1-8218 running on Windows XP.