My suggestion;

I'd like a function to block user input while performing certain actions, with the possibility to re-enable the input using a key combination or key for emergencies. Kinda like:

code:
; Install Program
Break off
$ = BlockInput ("E")
Shell "%comspec% /c setup.exe /s"
$ = BlockInput ()
Break on
In case of an emergency, pressing Shift-E would then enable the keyboard and mouse again. (in case of an error during setup or something, which isn't handled by the unattended setup).
But this may be hard to program ? Anyway, I think a lot of Kix users would really appreciate a function like this !
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Regards, Jeroen. There are two ways to write error-free programs. Only the third one works.