Getting mouseColor from outside the app window

[Malte Pfaff-Brill]

Timers are your friend. This works on my mac:

In a button:

on mouseUp
    set the uPoll of me to not the uPoll of me
    if the uPoll of me then pollColor
end mouseUp

on pollColor
    put the mousecolor
    if the uPoll of me then send "pollColor" to me in 40 millisecs
end pollColor

Click to start, click again to stop. Move your mouse anywhere, see the  
color in MSG.

Hope that helps,

Malte