Send WM_SETTINGCHANGE message from a PowerShell script

BroadcastSettingsChange.ps1

function _BroadcastSettingsChange
{
    if ([Environment]::UserInteractive)
    {
        $win32native = @'
namespace EnvUtils
{
    using System;
    using System.Runtime.InteropServices;
    using System.Runtime.Versioning;
    using System.Security;

    [SuppressUnmanagedCodeSecurity]
    public static class Win32Native
    {
        public static readonly IntPtr HWND_BROADCAST = new IntPtr(0xffff);
        public const int WM_SETTINGCHANGE = 0x001A;

        [DllImport("user32.dll", SetLastError = true, BestFitMapping = false)]
        [ResourceExposure(ResourceScope.Machine)]
        public static extern IntPtr SendMessageTimeout(IntPtr hWnd, int Msg, IntPtr wParam, string lParam, uint fuFlags, uint uTimeout, IntPtr lpdwResult);
    }
}
'@

        if (-not ([System.Management.Automation.PSTypeName]'EnvUtils.Win32Native').Type)
        {
            Add-Type -Language CSharp -TypeDefinition $win32native
        }

        [EnvUtils.Win32Native]::SendMessageTimeout([EnvUtils.Win32Native]::HWND_BROADCAST, [EnvUtils.Win32Native]::WM_SETTINGCHANGE, [IntPtr]::Zero, 'Environment', 0, 1000, [IntPtr]::Zero) | Out-Null
    }
}