autohotkey spam z to background window

;1. toggle on with f11
;2. capture window with f12
;3. toggle off with f11
;redo from 1 if you want to start again
#NoEnv
#Persistent,On
#SingleInstance,Force
SetWinDelay,0
SetControlDelay,0
SetBatchLines,-1
SendMode,Input
;SetKeyDelay,0

hotkeys=z
toggle=1

DOLOOP:
If(toggle = 1)
{
Loop
{
if(toggle=0)
break
ControlSend,%ctrl%,{z},ahk_id %win%
ControlSend,%ctrl%,{z DOWN},ahk_id %win%
sleep,1
}
}
Return

F11::
toggle := !toggle
TrayTip,%toggle%,-,2
Return

F12::
win:=WinExist("A")
Loop
{
parent:=DllCall("GetParent",UInt,win)
If parent=0
Break
win:=parent
}

ControlGetFocus,ctrl,ahk_id %win%
winGetClass,class,ahk_id %win%
TrayTip,%class% %ctrl% %win%,3,3
GoSub,DOLOOP
Return