Whilst I am sure you are correct, I've just popped back to BGP4 (BTW ought I to have done that and should I uninstall it?) and COPY activates my Windows Asterisk sound whereas BGP6 doesn't. Thus I conclude there is something different about the way BGP4 interacts with Windows which BGP6 doesn't do.
Can anyone else support me in this, please? Who gets a sound on Copy?