KeyIntercept is a utility that runs in the background monitoring keystrokes and transmitting serial data when a predefined key combination is pressed.

The main editing screen is shown below and is set to trigger a "Play" event from the key combination Shift+Ctrl+P, and transmit the hex bytes 0x20,0x01,0x21 from COM 1 at 38400 baud with 8 data bits, odd parity and 1 stop bit.

In normal operation KeyIntercept appears only as a number icon in the system tray at the right of the Windows Task Bar, the number shown indicates the last event triggered.

Up to 8 events can be defined along with their message data and each freely assigned to a serial port.