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Control Brightness Levels On Windows 10: Today i am going to tell you guys how to cthontrol your Computer Brightness in Windows 10. You will manage your PC brightness via the function keys on your Keyboard. If you type increase and Decrease brightness keys.  So you can with An Autohotkey Script.

 

Control Brightness Levels On Windows 10

Control Brightness Levels On Windows 10

 

Brightness Increment Levels

You have to make sure that you have installed AutoHotkey in your System.

To do this open Notepad and Paste the following in it.

class BrightnessSetter {
; qwerty12 – 27/05/17
; https://github.com/qwerty12/AutoHotkeyScripts/tree/master/LaptopBrightnessSetter
static _WM_POWERBROADCAST := 0x218, _osdHwnd := 0, hPowrprofMod
:= DllCall(“LoadLibrary”, “Str”, “powrprof.dll”, “Ptr”)

__New() {
if (BrightnessSetter.IsOnAc(AC))
this._AC := AC
if ((this.pwrAcNotifyHandle :=
DllCall(“RegisterPowerSettingNotification”, “Ptr”,
A_ScriptHwnd, “Ptr”, BrightnessSetter._GUID_ACDC_POWER_SOURCE(), “UInt”,
DEVICE_NOTIFY_WINDOW_HANDLE := 0x00000000, “Ptr”))) ;
Sadly the callback passed to *PowerSettingRegister*
Notification runs on a new threadl
OnMessage(this._WM_POWERBROADCAST, ((this.pwrBroadcastFunc
:= ObjBindMethod(this, “_On_WM_POWERBROADCAST”))))
}

__Delete() {
if (this.pwrAcNotifyHandle) {
OnMessage(BrightnessSetter._WM_POWERBROADCAST, this.pwrBroadcastFunc, 0)
,DllCall(“UnregisterPowerSettingNotification”, “Ptr”, this.pwrAcNotifyHandle)
,this.pwrAcNotifyHandle := 0
,this.pwrBroadcastFunc := “”
}
}

SetBrightness(increment, jump := False, showOSD := True, autoDcOrAc := -1, ptrAnotherScheme := 0)
{
static PowerGetActiveScheme := DllCall(“GetProcAddress”,
“Ptr”, BrightnessSetter.hPowrprofMod, “AStr”, “PowerGetActiveScheme”, “Ptr”)
,PowerSetActiveScheme := DllCall(“GetProcAddress”, “Ptr”,
BrightnessSetter.hPowrprofMod, “AStr”, “PowerSetActiveScheme”, “Ptr”)
,PowerWriteACValueIndex := DllCall(“GetProcAddress”, “Ptr”,
BrightnessSetter.hPowrprofMod, “AStr”, “PowerWriteACValueIndex”, “Ptr”)
,PowerWriteDCValueIndex := DllCall(“GetProcAddress”, “Ptr”,
BrightnessSetter.hPowrprofMod, “AStr”, “PowerWriteDCValueIndex”, “Ptr”)
,PowerApplySettingChanges := DllCall(“GetProcAddress”, “Ptr”,
BrightnessSetter.hPowrprofMod, “AStr”, “PowerApplySettingChanges”, “Ptr”)

if (increment == 0 && !jump) {
if (showOSD)
BrightnessSetter._ShowBrightnessOSD()
return
}

if (!ptrAnotherScheme ? DllCall(PowerGetActiveScheme, “Ptr”, 0, “Ptr*”,
currSchemeGuid, “UInt”) == 0 : DllCall(“powrprof\PowerDuplicateScheme”,
“Ptr”, 0, “Ptr”, ptrAnotherScheme, “Ptr*”, currSchemeGuid, “UInt”) == 0) {
if (autoDcOrAc == -1) {
if (this != BrightnessSetter) {
AC := this._AC
} else {
if (!BrightnessSetter.IsOnAc(AC)) {
DllCall(“LocalFree”, “Ptr”, currSchemeGuid, “Ptr”)
return
}
}
} else {
AC := !!autoDcOrAc
}

currBrightness := 0
if (jump || BrightnessSetter._GetCurrentBrightness(currSchemeGuid, AC, currBrightness)) {
maxBrightness := BrightnessSetter.GetMaxBrightness()
,minBrightness := BrightnessSetter.GetMinBrightness()

if (jump || !((currBrightness == maxBrightness && increment > 0) ||
(currBrightness == minBrightness && increment < minBrightness))) {
if (currBrightness + increment > maxBrightness)
increment := maxBrightness
else if (currBrightness + increment < minBrightness)
increment := minBrightness
else
increment += currBrightness

if (DllCall(AC ? PowerWriteACValueIndex : PowerWriteDCValueIndex, “Ptr”, 0,
“Ptr”, currSchemeGuid, “Ptr”, BrightnessSetter._GUID_VIDEO_SUBGROUP(), “Ptr”,
BrightnessSetter._GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt”, increment, “UInt”) == 0) {
; PowerApplySettingChanges is undocumented and exists only in Windows 8+.
Since both the Power control panel and the brightness slider use this,
we’ll do the same, but fallback to PowerSetActiveScheme if on Windows 7 or something
if (!PowerApplySettingChanges || DllCall(PowerApplySettingChanges, “Ptr”,
BrightnessSetter._GUID_VIDEO_SUBGROUP(), “Ptr”, BrightnessSetter.
_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt”) != 0)
DllCall(PowerSetActiveScheme, “Ptr”, 0, “Ptr”, currSchemeGuid, “UInt”)
}
}

if (showOSD)
BrightnessSetter._ShowBrightnessOSD()
}
DllCall(“LocalFree”, “Ptr”, currSchemeGuid, “Ptr”)
}
}

IsOnAc(ByRef acStatus)
{
static SystemPowerStatus
if (!VarSetCapacity(SystemPowerStatus))
VarSetCapacity(SystemPowerStatus, 12)

if (DllCall(“GetSystemPowerStatus”, “Ptr”, &SystemPowerStatus)) {
acStatus := NumGet(SystemPowerStatus, 0, “UChar”) == 1
return True
}

return False
}

GetDefaultBrightnessIncrement()
{
static ret := 10
DllCall(“powrprof\PowerReadValueIncrement”, “Ptr”, BrightnessSetter.
_GUID_VIDEO_SUBGROUP(), “Ptr”, BrightnessSetter.
_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt*”, ret, “UInt”)
return ret
}

GetMinBrightness()
{
static ret := -1
if (ret == -1)
if (DllCall(“powrprof\PowerReadValueMin”, “Ptr”, BrightnessSetter.
_GUID_VIDEO_SUBGROUP(), “Ptr”, BrightnessSetter.
_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt*”, ret, “UInt”))
ret := 0
return ret
}

GetMaxBrightness()
{
static ret := -1
if (ret == -1)
if (DllCall(“powrprof\PowerReadValueMax”, “Ptr”, BrightnessSetter.
_GUID_VIDEO_SUBGROUP(), “Ptr”, BrightnessSetter.
_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt*”, ret, “UInt”))
ret := 100
return ret
}

_GetCurrentBrightness(schemeGuid, AC, ByRef currBrightness)
{
static PowerReadACValueIndex := DllCall(“GetProcAddress”,
“Ptr”, BrightnessSetter.hPowrprofMod,
“AStr”, “PowerReadACValueIndex”, “Ptr”)
,PowerReadDCValueIndex := DllCall(“GetProcAddress”, “Ptr”,
BrightnessSetter.hPowrprofMod, “AStr”, “PowerReadDCValueIndex”, “Ptr”)
return DllCall(AC ? PowerReadACValueIndex :
PowerReadDCValueIndex, “Ptr”, 0, “Ptr”,
schemeGuid, “Ptr”, BrightnessSetter.
_GUID_VIDEO_SUBGROUP(),
“Ptr”, BrightnessSetter.
_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS(), “UInt*”, currBrightness, “UInt”) == 0
}

_ShowBrightnessOSD()
{
static PostMessagePtr := DllCall(“GetProcAddress”, “Ptr”,
DllCall(“GetModuleHandle”, “Str”, “user32.dll”, “Ptr”),
“AStr”, A_IsUnicode ? “PostMessageW” : “PostMessageA”, “Ptr”)
,WM_SHELLHOOK := DllCall(“RegisterWindowMessage”, “Str”,
“SHELLHOOK”, “UInt”)
if A_OSVersion in WIN_VISTA,WIN_7
return
BrightnessSetter._RealiseOSDWindowIfNeeded()
; Thanks to YashMaster @
https://github.com/YashMaster/Tweaky/blob/master/Tweaky/BrightnessHandler.
h for realising this could be done:
if (BrightnessSetter._osdHwnd)
DllCall(PostMessagePtr, “Ptr”,
BrightnessSetter._osdHwnd, “UInt”, WM_SHELLHOOK, “Ptr”, 0x37, “Ptr”, 0)
}

_RealiseOSDWindowIfNeeded()
{
static IsWindow := DllCall(“GetProcAddress”, “Ptr”, DllCall(“GetModuleHandle”,
“Str”, “user32.dll”, “Ptr”), “AStr”, “IsWindow”, “Ptr”)
if (!DllCall(IsWindow, “Ptr”, BrightnessSetter._osdHwnd) && !BrightnessSetter.
_FindAndSetOSDWindow()) {
BrightnessSetter._osdHwnd := 0
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)
if (BrightnessSetter._FindAndSetOSDWindow())
return
}
; who knows if the SID & IID above will work for future versions of Windows 10
(or Windows 8). Fall back to this if needs must
Loop 2 {
SendEvent {Volume_Mute 2}
if (BrightnessSetter._FindAndSetOSDWindow())
return
Sleep 100
}
}
}

_FindAndSetOSDWindow()
{
static FindWindow := DllCall(“GetProcAddress”, “Ptr”, DllCall
(“GetModuleHandle”, “Str”, “user32.dll”, “Ptr”),
“AStr”, A_IsUnicode ? “FindWindowW” : “FindWindowA”, “Ptr”)
return !!((BrightnessSetter._osdHwnd
:= DllCall(FindWindow, “Str”, “NativeHWNDHost”, “Str”, “”, “Ptr”)))
}

_On_WM_POWERBROADCAST(wParam, lParam)
{
;OutputDebug % &this
if (wParam == 0x8013 && lParam && NumGet(lParam+0, 0, “UInt”) ==
NumGet(BrightnessSetter._GUID_ACDC_POWER_SOURCE()+0, 0, “UInt”))
{ ; PBT_POWERSETTINGCHANGE and a lazy comparison
this._AC := NumGet(lParam+0, 20, “UChar”) == 0
return True
}
}

_GUID_VIDEO_SUBGROUP()
{
static GUID_VIDEO_SUBGROUP__
if (!VarSetCapacity(GUID_VIDEO_SUBGROUP__)) {
VarSetCapacity(GUID_VIDEO_SUBGROUP__, 16)
,NumPut(0x7516B95F, GUID_VIDEO_SUBGROUP__, 0, “UInt”),
NumPut(0x4464F776, GUID_VIDEO_SUBGROUP__, 4, “UInt”)
,NumPut(0x1606538C, GUID_VIDEO_SUBGROUP__, 8, “UInt”),
NumPut(0x99CC407F, GUID_VIDEO_SUBGROUP__, 12, “UInt”)
}
return &GUID_VIDEO_SUBGROUP__
}

_GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS()
{
static GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__
if (!VarSetCapacity(GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__)) {
VarSetCapacity(GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__, 16)
,NumPut(0xADED5E82, GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__, 0, “UInt”),
NumPut(0x4619B909, GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__, 4, “UInt”)
,NumPut(0xD7F54999, GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__, 8, “UInt”),
NumPut(0xCB0BAC1D, GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__, 12, “UInt”)
}
return &GUID_DEVICE_POWER_POLICY_VIDEO_BRIGHTNESS__
}

_GUID_ACDC_POWER_SOURCE()
{
static GUID_ACDC_POWER_SOURCE_
if (!VarSetCapacity(GUID_ACDC_POWER_SOURCE_)) {
VarSetCapacity(GUID_ACDC_POWER_SOURCE_, 16)
,NumPut(0x5D3E9A59, GUID_ACDC_POWER_SOURCE_, 0, “UInt”),
NumPut(0x4B00E9D5, GUID_ACDC_POWER_SOURCE_, 4, “UInt”)
,NumPut(0x34FFBDA6, GUID_ACDC_POWER_SOURCE_, 8, “UInt”),
NumPut(0x486551FF, GUID_ACDC_POWER_SOURCE_, 12, “UInt”)
}
return &GUID_ACDC_POWER_SOURCE_
}

}

BrightnessSetter_new() {
return new BrightnessSetter()
}

 

At the end of this Pasting the Following. That is the part of Script which shill modify to suite your own needs. This following will changes the brightness of via the Page up and Down keys on your System keyboard.

Control Brightness Levels On Windows 10

You have to save this script with The Autohotkeys file extension and run it. Use the keys that you have adjust for Brightness.

 

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