There is possibility to change window transperency in only one way, opening options, selecting Display\Options\Windows...
Ok, but if we need to change that transperency through script?
Only way to do that is:
To retrive transperency value:
To set a new transperency value:
var %file = $readini(mirc.ini,options,n4), %new-value = 10
writeini mirc.ini options n4 $puttok(%file, %new-value, 35, 44)
And after that, you need to restart mirc and new value will be loaded from mirc.ini file.
Ok, it is easy task, but I think it would be great to make such a command implemented in mirc itself and applying this change without restarting mirc.