Change the screen brightness using AppleScript

Thanks!

This is absolutely great. I've been searching high and low on the internet for something like this...

Cheers.

I have a further question... 🙂

It is a PowerBook plugged into an external (non-Apple) display. When the PowerBook isn't plugged into the display, the brightness script works fine, however- I have the toolbar set to automatically be on the second monitor when the second monitor is available. When the toolbar is on the second monitor, the script no longer works, returning the error:

System Events got an error: NSReceiverEvaluationScriptError: 4

I am guessing that I recieve this error because the brightness slider is now no longer on the main window, but the display properties window on the PowerBook's monitor (which isn't the primary display).

You've been a great help so far, thank you so much!

Richard

I just figured it out!

tell application "System Preferences" to set current pane to pane "Displays"

tell application "System Events"
tell process "System Preferences"
tell tab group 1 of window 0 -- Change this to 'window 0'
click radio button 1
tell slider 1 of group 2
set CurVal to value
set value to CurVal - 1
end tell
end tell
end tell
end tell

quit application "System Preferences"


Thanks again!