For years, the lingua franca for desktop computers was the Beginner’s All-purpose Symbolic Instruction Code, a.k.a. Basic. Essentially every PC had it, and just about anyone could learn to program ...

So I'm trying to detect through Visual Basic 6.0 when a voltage change occurs on one of the pins of the serial/parallel port. The whole thing is pretty simple; no data transfer/handshaking/etc needs ...