Hi,
FSUIPC 3.81 has a new facility called Mouse Macro Control. I have used this to define controls for toggling Marker sound on/off, ILS morse sound on/off, and so on.
Read more and get the 20 macro's file from:
<URL>http://www.lekseecon.nl/news.html#news200818</URL>
Cheers,
Nico