AutoHotkey Community

using System;
using System.Collections.Generic;
using System.Text;

namespace DisplayBrightnessConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine(GetBrightness());
            }
            else if (args[0] == "-getlevels")
            {
                byte[] BrightnessLevels = GetBrightnessLevels();

                foreach (byte b in BrightnessLevels)
                {
                    Console.WriteLine(b.ToString());
                }
            }
            else
            {
                //parse switch value
                byte targetBrightness = byte.Parse(args[0]);
                SetBrightness(targetBrightness);
                Console.WriteLine("0"); //success value
            }
        }

        static byte GetBrightness()
        {
            //define scope (namespace)
            System.Management.ManagementScope s = new System.Management.ManagementScope("root\\WMI");

            //define query
            System.Management.SelectQuery q = new System.Management.SelectQuery("WmiMonitorBrightness");

            //output current brightness
            System.Management.ManagementObjectSearcher mos = new System.Management.ManagementObjectSearcher(s, q);

            System.Management.ManagementObjectCollection moc = mos.Get();

            //store result
            byte curBrightness = 0;

            foreach (System.Management.ManagementObject o in moc)
            {
                curBrightness = (byte)o.GetPropertyValue("CurrentBrightness");
                break; //only work on the first object
            }

            moc.Dispose();
            mos.Dispose();

            return curBrightness;
        }

        static byte[] GetBrightnessLevels()
        {
            //define scope (namespace)
            System.Management.ManagementScope s = new System.Management.ManagementScope("root\\WMI");

            //define query
            System.Management.SelectQuery q = new System.Management.SelectQuery("WmiMonitorBrightness");

            //output current brightness
            System.Management.ManagementObjectSearcher mos = new System.Management.ManagementObjectSearcher(s, q);

            System.Management.ManagementObjectCollection moc = mos.Get();

            //store result
            byte[] BrightnessLevels = new byte[0];

            foreach (System.Management.ManagementObject o in moc)
            {
                BrightnessLevels = (byte[])o.GetPropertyValue("Level");
                break; //only work on the first object
            }

            moc.Dispose();
            mos.Dispose();

            return BrightnessLevels;
        }

        static void SetBrightness(byte targetBrightness)
        {
            //define scope (namespace)
            System.Management.ManagementScope s = new System.Management.ManagementScope("root\\WMI");

            //define query
            System.Management.SelectQuery q = new System.Management.SelectQuery("WmiMonitorBrightnessMethods");

            //output current brightness
            System.Management.ManagementObjectSearcher mos = new System.Management.ManagementObjectSearcher(s, q);

            System.Management.ManagementObjectCollection moc = mos.Get();

            foreach (System.Management.ManagementObject o in moc)
            {
                o.InvokeMethod("WmiSetBrightness", new Object[] { UInt32.MaxValue, targetBrightness }); //note the reversed order - won't work otherwise!
                break; //only work on the first object
            }

            moc.Dispose();
            mos.Dispose();
        }
    }
}

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.
#Persistent
#SingleInstance Force
#Include StdoutToVar.ahk
width := A_ScreenWidth
test := StdoutToVar_CreateProcess("DisplayBrightnessConsole.exe")
StringReplace, test, test, `r`n
If test not between 0 and 100
 {
  MsgBox, Display Brightness is not compatible with your system. It is only for laptops with integrated displays running Windows Vista or Windows 7 (with display brightness programmable via WMI).
  ExitApp
}
Menu, Tray, DeleteAll
Menu, Tray, Add, Windows Mobility Center (Win-X), MblCtr
Menu, Tray, Default, Windows Mobility Center (Win-X)
Menu, Tray, Standard
abl := StdoutToVar_CreateProcess("DisplayBrightnessConsole.exe -getlevels")
StringReplace, abl, abl, `r`n, `n, UseErrorLevel
StringTrimRight, abl, abl, 1
Sort, abl, N R Z
Loop, default\*.ico
icons .= A_LoopFileName . "`n"
Sort, icons, N R Z
StringTrimRight, icons, icons, 1
StringSplit, icon, icons, `n
Loop, Parse, abl, `n
FileCopy, % "default\" . icon%A_Index%, %A_LoopField%.ico, 1
SetTimer, GetCurrentLevel, 500 ; Will this value determine if DisplayBrightnessConsole.exe crashes? Was 500 previously.
SetTimer, CloseError

GetCurrentLevel:
IfNotEqual, A_ScreenWidth, %width%
{
 Sleep 2000
 Goto, GetCurrentLevel
 }
cbl := StdoutToVar_CreateProcess("DisplayBrightnessConsole.exe")
StringReplace, cbl, cbl, `r`n
IfNotExist, %cbl%.ico
{
 Sleep 800
 Goto, GetCurrentLevel
}
Menu, Tray, Icon, %cbl%.ico
Menu, Tray, Tip, Display Brightness: %cbl%`%
Return

CloseError:
WinWait, DisplayBrightnessConsole
WinClose
Return

MblCtr:
Send, #x
Return