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
    }
}

@Ahmad-f79 Does it work on Windows 11 too? I'm trying it but it shows the volume indicator instead

The below code works fine in Windows 11. You can adjust the brightness using Shift+Mouse Scroller Up/Down.

;Shift + Mouse Scroller

+WheelDown::
    AdjustScreenBrightness(-5)
Return

+WheelUp::
    AdjustScreenBrightness(5)
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
    }
}

@erbanku Thank you, yes I'm using that piece of code, but it does not let the brightness bar popup appear

I tried using the code posted by @Ahmad-f79 but it doesn't work (I'm on Windows 11)

@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
}

@venturqx, @Rabelaiss
Here is my updated code with windows GUI brightness overlay... working on my Lenovo laptop with Win 10.

#SingleInstance, Force

; Mouse scroll up and down holding shift
+WheelDown::
{
	AdjustScreenBrightness(-10)
	BrightnessOSD()
	return
}

+WheelUp::
{
	AdjustScreenBrightness(10)
	BrightnessOSD()
	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) {
        return
    }
    if (toSet < minBrightness) {
        toSet := minBrightness
    }

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

BrightnessOSD() {
	static PostMessagePtr := DllCall("GetProcAddress", "Ptr", DllCall("GetModuleHandle", "Str", "user32.dll", "Ptr"), "AStr", A_IsUnicode ? "PostMessageW" : "PostMessageA", "Ptr")
	 ,WM_SHELLHOOK := DllCall("RegisterWindowMessage", "Str", "SHELLHOOK", "UInt")
	static FindWindow := DllCall("GetProcAddress", "Ptr", DllCall("GetModuleHandle", "Str", "user32.dll", "Ptr"), "AStr", A_IsUnicode ? "FindWindowW" : "FindWindowA", "Ptr")
	HWND := DllCall(FindWindow, "Str", "NativeHWNDHost", "Str", "", "Ptr")
	IF !(HWND) {
		try IF ((shellProvider := ComObjCreate("{C2F03A33-21F5-47FA-B4BB-156362A2F239}", "{00000000-0000-0000-C000-000000000046}"))) {
			try IF ((flyoutDisp := ComObjQuery(shellProvider, "{41f9d2fb-7834-4ab6-8b1b-73e74064b465}", "{41f9d2fb-7834-4ab6-8b1b-73e74064b465}"))) {
				DllCall(NumGet(NumGet(flyoutDisp+0)+3*A_PtrSize), "Ptr", flyoutDisp, "Int", 0, "UInt", 0)
				 ,ObjRelease(flyoutDisp)
			}
			ObjRelease(shellProvider)
		}
		HWND := DllCall(FindWindow, "Str", "NativeHWNDHost", "Str", "", "Ptr")
	}
	DllCall(PostMessagePtr, "Ptr", HWND, "UInt", WM_SHELLHOOK, "Ptr", 0x37, "Ptr", 0)
}

If there was a way to adjust the brightness through "hovering the mouse on the top part of screen and then using the mouse wheel", instead of pressing the Shift key on the keyboard while using the mouse wheel would be a great, speedy action and yet more practical to my mind.
Could the current code be written this way? I did not have the knowledge to write it myself :(