#2 Changing volume while sending can disable keyboard.

[C. Poda]

Changing the volume setting while the program is sending code disables some of the keyboard keys. Your responses are ignored. The space Bar is enabled, and it can stop & start sending.

Steps to reproduce.
. Press the Start button and hear the program send code.
. Respond to the code you hear, and see proper operation: See red or green block flash in the main window, and hear other chars that are sent.
. Move the pointer to the volume slider, and change its setting up or down.
. From this point on, the program does not respond to keys you press (except Space Bar).
. The same character pattern continues to be sent.
. Occasionally, the symbol being sent is shown in the main window.
. Press Space Bar to terminate sending.
. Press Space Bar to restart sending.
. Observe normal operation: the program does respond when you press keys besides the Space Bar.

Suggest.
. Do not allow keyboard to be disabled (lose focus?) at any time, especially while the program is sending data.
. Consider disabling and graying-out the volume slider while program is sending.