Read and set keyboard delay and speed in Windows (requires new PowerShell because I was too lazy to write old C# code 😁)

KeyboardSpeed.cmd

<# : 
@echo off & setlocal & set __args=%* & pwsh.exe -NoProfile -Command Invoke-Expression ('. { ' + (Get-Content -LiteralPath ""%~f0"" -Raw) + ' }' + $env:__args) & exit /b %ERRORLEVEL%
#> Add-Type @'
// ========== BEGIN C# CODE ==========
using System;
using System.Runtime.InteropServices;

public class Program
{
	public static void Main(string[] args)
	{
		var (delay, speed) = GetSetting();
		Console.WriteLine($"Current delay {delay}, speed {speed}");

		if (args.Length == 2)
		{
			if (!int.TryParse(args[0], out delay) || delay < 0 || delay > 3)
			{
				Console.WriteLine("Invalid argument: delay");
				return;
			}
			if (!int.TryParse(args[1], out speed) || speed < 0 || speed > 31)
			{
				Console.WriteLine("Invalid argument: speed");
				return;
			}
			Console.WriteLine($"Setting delay {delay}, speed {speed}");
			SetSetting(delay, speed);
		}
		else if (args.Length != 0)
		{
			Console.WriteLine("Invalid arguments.");
			Console.WriteLine("Usage: KeyboardSpeed <delay> <speed>");
			Console.WriteLine("- delay: 0 (250 ms) to 3 (1 s)");
			Console.WriteLine("- speed: 0 (2.5 ch/s) to 31 (30 ch/s)");
		}
	}

	private static (int Delay, int Speed) GetSetting()
	{
		int delay = 0;
		SystemParametersInfo(SPI_GETKEYBOARDDELAY, 0, ref delay, 0);
		int speed = 0;
		SystemParametersInfo(SPI_GETKEYBOARDSPEED, 0, ref speed, 0);
		return (delay, speed);
	}

	private static void SetSetting(int delay, int speed)
	{
		int unused = 0;
		SystemParametersInfo(SPI_SETKEYBOARDDELAY, (uint)delay, ref unused, 0);
		SystemParametersInfo(SPI_SETKEYBOARDSPEED, (uint)speed, ref unused, 0);
	}

	[DllImport("user32.dll", SetLastError = false)]
	private static extern bool SystemParametersInfo(uint uiAction, uint uiParam, ref int pvParam, uint fWinIni);

	[DllImport("user32.dll", SetLastError = false)]
	private static extern bool SystemParametersInfo(uint uiAction, uint uiParam, nint pvParam, uint fWinIni);

	private const uint SPI_GETKEYBOARDDELAY = 0x0016;
	private const uint SPI_SETKEYBOARDDELAY = 0x0017;
	private const uint SPI_GETKEYBOARDSPEED = 0x000a;
	private const uint SPI_SETKEYBOARDSPEED = 0x000b;
}
// ========== END C# CODE ==========
'@; [Program]::Main($args)