[gtkada] Ping sound

[manuel.op.de.coul at eon-benelux.com]

If I press an accelerator key of a menu item in
my application on a Windows machine, there's first
a ping sound, and then the menu item is activated.
This only happens with an Alt-key combination, and
with all Alt-key combinations.
Does someone know what's wrong and how it can be
solved (I don't mean by replacing the sound)?
Thanks,

Manuel