I just want a little utility that monitors mouse clicks so that when one occurs a visual bubble effect (or something similar) occurs, similar to something you might see in a screencast.
This Windows option;
Together with an AutoHotkey script similar to;
(Every mouse click (down & up) fires a Ctrl briefly)
As pointed out by Paolo you can even make the Mouse setting changed as part of the script:
I don't know if this is what you are looking for but I take a guess:
Hope this will help!