AutoHotkey Cookbook

This example is rather contrived to showcase the practices that I use rather than the functions to which I apply them.

; ahk for example (what this is used for)
version = 20140506070810
author = alexx ; Tooltip can talk to me by name with %author%
#SingleInstance force  ; try to prevent multipe instances of ahk
SetCapsLockState, off
SetNumLockState, off
CapsLock::Shift     ; happy hacker style - turns Caps Lock into a shift key

; F6 breaks any active loops and tries to reload the AutoHotkey.ahk script
F6::
    Reload
return

;Shift-F6 toggles Suspends AutoHotkey so that everything works as normal
+F6::
    Suspend
return

; get the position and colour at the location of the mouse pointer
^!+?::
    MouseGetPos, xpos, ypos
    PixelGetColor, pixColor, %xpos%, %ypos%
    Tooltip, %pixColor% %xpos%`,%ypos%, %xpos%, ( ypos - 20 ), 20
return

;
; global functions
;

blank_screen(){
    SendMessage 0x112, 0xF170, 2, , Program Manager  ; Monitor off
return
}

; "boss key"  Windows-\ (Windows "backslash")
#\:: blank_screen()
        

If you hammer F6 it can still, sometimes end up with two or more instanced of ahk running