Problem with registry permission

[Turtlix21]

I'm trying to make a simple program which will turn off all audio devices, except chosen one. I found registry locations and keys to make it, but I only can read values from this location. All attemps to make a new one or delete a key returns 0 and sets extended to 5 ("unable to open requested main key" and "unable to remote connect to the registry"). It looks like autoit script only has permissions to read values, I added #ReguireAdmin in first line but It changed nothing. I also tried to change permissions in registry but it all time ends with "access denied".

#RequireAdmin
;~ $Return = RegWrite("HKLM64\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render\{96b80f31-032c-46e7-bde0-5485e67679ce}", "DeviceState", "REG_DWORD", 1) ;Return: 0 ;extended: 5 (doesn't work) Goal is to make it works

$Return = RegWrite("HKLM64\SOFTWARE\Microsoft\Windows\CurrentVersion", "State", "REG_DWORD", "1") ;Return: 1 ;extended: 0 (works)
RegDelete("HKLM64\SOFTWARE\Microsoft\Windows\CurrentVersion", "State")

;~ $Return = RegWrite("HKLM64\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices", "State", "REG_DWORD", "1") ;Return: 0 ;extended: 5 (doesn't work)
;~ RegDelete("HKLM64\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices", "State")

MsgBox(0, "", "Returned value: " & $Return & @CRLF & "Extended: " & @extended)

Problem starts in "MMDevices" location, in lower stages of location everythig is fine.

[BrewManNH]

For one thing, the RegWrite and RegDelete commands aren't referencing the same locations as the commented out code. Also, a simple right click on the key and selecting permissions would have told you that administrators and users have no rights to delete any values or the key itself, and very limited rights to change anything in there.

[Turtlix21]

So, which group of permissions autoit script is using ? (ALL APPLICATION PACKAGES, User, Administrator, AudioEndpointBuilder or Audiosrv) I also don't know how to change permissions in MMDevices becouse all time "access danied", any ideas ?

[BrewManNH]

You don't have access to change it, it's controlled by the AudioSrv permission group. And only the AudoiSrv group can delete anything in that key. What ever it is you're trying to do in there isn't possible by changing or deleting keys/values in that section.

What do you mean by "turn off all audio devices"? What is it you're attempting to do by turning them off? I'm sure it can be achieved in another way than trying to brute force a registry setting.

[Turtlix21]

I want to change audio output by turning off all audio devices except one (eg. I want to change output to speakers, from headphones). I found location of registry key in Internet which change the state of device ("HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render\{DEVICE-HASH}", "DeviceState"). When DeviceState is equal 1 device is on and when it's equal 268435457 device is off. I've made this and everythig looks fine, but I can't write in registry from script (I can write and delete keys by manually using regedit.exe)

expandcollapse popup

#RequireAdmin
#include <array.au3>

Func AudioOutput($DeviceName)
    Local $i = 0
    Local $Devices[0 + 1][3 + 1]
    Local $RegistryLocation = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render"
    While 1
        $i += 1
        Local $DeviceID = RegEnumKey($RegistryLocation, $i)
        If $DeviceID = "" Then ExitLoop
        If RegRead($RegistryLocation & "\" & $DeviceID, "Role:0") <> "" Then
            If RegRead($RegistryLocation & "\" & $DeviceID, "DeviceState") = 1 Then
                Local $IsOn = 1
            Else
                Local $IsOn = 0
            EndIf
            _ArrayAdd($Devices, $DeviceID & "|" & RegRead($RegistryLocation & "\" & $DeviceID & "\Properties", "{a45c254e-df1c-4efd-8020-67d146a850e0},2") & "|" & $IsOn, 1)
        EndIf
    WEnd
    _ArrayDisplay($Devices)
    $WhereDeviceInArray = _ArraySearch($Devices, $DeviceName)
    If $WhereDeviceInArray = -1 Then
        Return -1
    ElseIf $Devices[$WhereDeviceInArray][3] = 1 Then
        Return 2
    Else
        For $i = 1 To UBound($Devices)
            RegWrite($RegistryLocation & "\" & $Devices[$i][1], "DeviceState", "REG_DWORD", 268435457)
        Next
        RegWrite($RegistryLocation & "\" & $Devices[$WhereDeviceInArray][1], "DeviceState", "REG_DWORD", 1)
        Return 1
    EndIf
EndFunc   ;==>AudioOutput


MsgBox(0, "", AudioOutput("Speakers"))

Changing audio output by registry looks like the most unproblematic way.

Edited June 16, 2016 by Turtlix21

[BrewManNH]

Repeating yourself isn't helping. Tell us what you want to do, exactly, and then we can help. You've already found out you can't do it by a script using those keys in the registry, so there needs to be another method. That method can't be determined until you tell us what you're trying to do.

[Turtlix21]

I want to make function to change audio output, it's all.

[LeConstantinopolitan]

A bit late but there is a solution:

Go what file you want, right click to the Permissions, Advanced. Now you should see who is the Owner. Change it to yourself or administrator. If you cannot "Enter the object name", go Advanced and find yourself via "Find Now". You should see yourself in there.