Fun story about "field programming" VB6 as a young startup: Customer wanted pandora over the restaurant speakers, "No problemo, I got an aux to RCA in the car". Customer likes free music, now wants front entry intercom mic to talk to customers over stereo system. No problemo, Google VB6 volume mixer. One line of my LPT port sniffing code added, Boom! insert paper clip into a few pins on the LPT port and solder to 50ft. cable, then soldered to pads on freshly wall mounted mouse (IBM TWO BUTTON WHITE THING), so it can short the pins on LPT, mute WaveOut and unmute wall mounted microphone (ALSO WHITE THING WITH THAT CRT PIVOT MOUNT) on 50' aux extender. I think I only charged $40.00/hr for that kinda stuff back then...