LockScreen_Mute

/* 2>nul || title LockScreen_Mute.bat by AveYo v2018.11.20
@echo off

:: Compile Mute.cs snippet
mkdir %APPDATA%\AveYo 2>nul
pushd %APPDATA%\AveYo
del /f /q Mute.exe >nul 2>nul
for /f "tokens=* delims=" %%v in ('dir /b /s /a:-d /o:-n "%Windir%\Microsoft.NET\Framework\*csc.exe"') do set "csc="%%v""
%csc% /out:Mute.exe /target:winexe /platform:anycpu /optimize /nologo "%~f0"
if not exist Mute.exe echo ERROR! Failed compiling c# snippet & timeout /t -1 & exit /b

:: Create scheduled tasks to run Mute on Lock and Unlock
powershell -c "iex(([io.file]::ReadAllText('%~f0')-split':PS_MUTETASKS\:.*')[1]);"

:: Test task
schtasks /run /TN Mute_Lock
timeout -1
schtasks /run /TN Mute_UnLock

:: Done!
exit/b

:PS_MUTETASKS:
$state=@('Unlock','Lock'); 0..1 | foreach { Register-ScheduledTask -TaskName "Mute_$($state[$_])" -Force -Xml @"
<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
  <RegistrationInfo>
    <Author>AveYo</Author>
    <URI>\Mute_$($state[$_])</URI>
  </RegistrationInfo>
  <Triggers>
    <SessionStateChangeTrigger>
      <Enabled>true</Enabled>
      <StateChange>Session$($state[$_])</StateChange>
      <UserId>$((gwmi -query 'select UserName from Win32_ComputerSystem').UserName)</UserId>
      <Delay>PT$(2*$_+1)S</Delay>
    </SessionStateChangeTrigger>
  </Triggers>
  <Principals>
    <Principal id="Author">
      <UserId>$(([System.Security.Principal.NTAccount](gwmi -query 'select Username from Win32_ComputerSystem').UserName
      ).Translate([System.Security.Principal.SecurityIdentifier]).Value)</UserId>
      <LogonType>InteractiveToken</LogonType>
      <RunLevel>LeastPrivilege</RunLevel>
    </Principal>
  </Principals>
  <Settings>
    <MultipleInstancesPolicy>StopExisting</MultipleInstancesPolicy>
    <DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>
    <StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>
    <AllowHardTerminate>true</AllowHardTerminate>
    <StartWhenAvailable>true</StartWhenAvailable>
    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
    <IdleSettings>
      <StopOnIdleEnd>true</StopOnIdleEnd>
      <RestartOnIdle>false</RestartOnIdle>
    </IdleSettings>
    <AllowStartOnDemand>true</AllowStartOnDemand>
    <Enabled>true</Enabled>
    <Hidden>false</Hidden>
    <RunOnlyIfIdle>false</RunOnlyIfIdle>
    <WakeToRun>true</WakeToRun>
    <ExecutionTimeLimit>PT0S</ExecutionTimeLimit>
    <Priority>5</Priority>
  </Settings>
  <Actions Context="Author">
    <Exec>
      <Command>"%APPDATA%\AveYo\Mute.exe"</Command>
      <Arguments>$_</Arguments>
    </Exec>
  </Actions>
</Task>
"@ }
:PS_MUTETASKS:

Mute.cs */
using System;
using System.Runtime.InteropServices;
using System.Reflection;

[assembly:AssemblyTitle("Mute")]
[assembly:AssemblyCompanyAttribute("AveYo")]
[assembly:AssemblyVersionAttribute("2018.11.20")]

namespace Mute
{
  class Program
  {
    private const int WM_APPCOMMAND = 0x319;
    private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
    private const int APPCOMMAND_VOLUME_UP = 0xA0000;
    private const int APPCOMMAND_VOLUME_DOWN = 0x90000;
    [DllImport("user32.dll", SetLastError = false)]
    public static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll", SetLastError = false)]
    public static extern IntPtr SendMessageW(IntPtr hWnd,int Msg,IntPtr wParam,IntPtr lParam);
    static void Main(string[] args)
    {
      bool Mute = (args.Length > 0 && args[0] == "1");
      bool Loud = (args.Length > 0 && args[0] == "0");
      try
      {
        IntPtr h = GetForegroundWindow();
        if (Mute)
        {
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_DOWN);
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_UP);
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_MUTE);
        }
        else if (Loud)
        {
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_DOWN);
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_UP);
        }
        else
        {
          SendMessageW(h,WM_APPCOMMAND,IntPtr.Zero,(IntPtr)APPCOMMAND_VOLUME_MUTE);
        }
      }
      catch (Exception)
      {
      }
    }
  }
}
/*_*/