MIDIKEYB: Demonstrates the midiKeyB Control

MIDIKEYB is designed to show how to use midiKeyB, which is
a custom control that implements a musical instrument
digital interface (MIDI)-style keyboard. This keyboard is
not exactly the best keyboard for a jam session; don't
expect to hit a bunch of hemidemisemiquavers at correct
tempo.

The midiKeyB control responds to and sends short MIDI
messages. The right mouse button is used for "sticky keys"
and toggles the state appropriately.

For more information, see the function headers in the
source code.

MIDIKEYB was built and tested under Microsoft(R)
Windows(TM) version 3.1.
