AutoHotkey Community

To undo an action in Photoshop you have to press Ctrl+Alt+Z. Is there any way to map all three keys to the Ctrl button only?
This is what I've got so far. I need help on the keys.

#IfWinActive ahk_class Photoshop
$Ctrl::
return

I want to tie the above into my existing AutoHotkey script below. I'm confused by what exactly requires a 'return'??

Try this: (tested)
A return is required on multiple line hotkeys.

Thank you Xtra, worked perfectly.

though I'd add a #IfWinActive at the end

#IfWinActive ahk_class Notepad++
;your code goes here
#IfWinActive