Windows screen brightness fine tune (autohotkey)

brightness.ahk

#,::
  AdjustScreenBrightness(-3)
  Return
  
#.::
  AdjustScreenBrightness(3)
  Return
  
AdjustScreenBrightness(step) {
    service := "winmgmts:{impersonationLevel=impersonate}!\\.\root\WMI"
    monitors := ComObjGet(service).ExecQuery("SELECT * FROM WmiMonitorBrightness WHERE Active=TRUE")
    monMethods := ComObjGet(service).ExecQuery("SELECT * FROM wmiMonitorBrightNessMethods WHERE Active=TRUE")
    minBrightness := 5  ; level below this is identical to this

    for i in monitors {
        curt := i.CurrentBrightness
        break
    }
    if (curt < minBrightness)  ; parenthesis is necessary here
        curt := minBrightness
    toSet := curt + step
    if (toSet > 100)
        return
    if (toSet < minBrightness)
        toSet := minBrightness
        
    

    for i in monMethods {
        i.WmiSetBrightness(1, toSet)
        break
    }
}

@Rabelaiss Did you find a solution to display the Brightness OSD on W11 ?

Updated Script for AHK v2. I could not get the OS brightness popup to work, So I implemented my own tooltip.

; Brightness Control ;

+WheelDown::
{
  AdjustScreenBrightness(-3)
  return
}

+WheelUp::
{
  AdjustScreenBrightness(3)
  return
}

AdjustScreenBrightness(step) {
    service := "winmgmts:{impersonationLevel=impersonate}!\\.\root\WMI"
    monitors := ComObjGet(service).ExecQuery("SELECT * FROM WmiMonitorBrightness WHERE Active=TRUE")
    monMethods := ComObjGet(service).ExecQuery("SELECT * FROM wmiMonitorBrightNessMethods WHERE Active=TRUE")
    minBrightness := 0

    curt := 0 
    for monitor in monitors {
        curt := monitor.CurrentBrightness
        break
    }
    if (curt < minBrightness) {  
        curt := minBrightness
    }
    toSet := curt + step
    if (toSet > 100) {
        ToolTip "Brightness: 100%"
        return
    }
    if (toSet < minBrightness) {
        toSet := minBrightness
    }

    for method in monMethods {
        method.WmiSetBrightness(1, toSet)
        break
    }
    ToolTip "Brightness: " toSet "%"
    SetTimer RemoveToolTip, -1000  ; Remove tooltip after 1 second
}

RemoveToolTip(){
	ToolTip  ; Clears the tooltip
	return
}