GetAsyncKeyState wrapper

AsyncKeyState.cs

using System;
using System.Runtime.InteropServices;

namespace System.Input
{
    public static class AsyncKeyState
    {
	[DllImport("user32.dll")]
	private static extern short GetAsyncKeyState(int key);
		
        public static readonly int MaxKeyCode = 0xFF;
        public static readonly int MinKeyCode = 0x00;

        public static bool IsPressed(VirtualKeyCode key)
        {
            if ((int)key < MinKeyCode || (int)key > MaxKeyCode) throw new ArgumentOutOfRangeException(nameof(key));

            return (GetAsyncKeyState((int)key) & 0x8000) != 0;
        }

        public static bool WasPressed(VirtualKeyCode key)
        {
            if ((int)key < MinKeyCode || (int)key > MaxKeyCode) throw new ArgumentOutOfRangeException(nameof(key));

            var result = GetAsyncKeyState((int)key);

            return (result & 0x8000) == 0
                && (result & 0x0001) != 0;
        }

        public static bool IsFirstTimePressed(VirtualKeyCode key)
        {
            if ((int)key < MinKeyCode || (int)key > MaxKeyCode) throw new ArgumentOutOfRangeException(nameof(key));

            var result = GetAsyncKeyState((int)key);

            return (result & 0x8000) != 0
                && (result & 0x0001) != 0;
        }

        public static bool IsUp(VirtualKeyCode key)
        {
            if ((int)key < MinKeyCode || (int)key > MaxKeyCode) throw new ArgumentOutOfRangeException(nameof(key));

            var result = GetAsyncKeyState((int)key);

            return (result & 0x8000) == 0;
        }
    }
}