Windows basic keyboard InputManager

/*
 Provides InputManager::isKeyDown(int ascii) using Windows native functions.
 Ergo: very basic game controls when SDL and other libraries are unavailable.
*/
#pragma once
#include "Windows.h"
class InputManager{
public:
    //expects windows virtual key VK_* codes
    //https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731(v=vs.85).aspx
    static bool InputManager::isKeyDown(int key){
        return (::GetAsyncKeyState(key) & (1 << 16));
    }
};
static const int VK_0 = int('0');
static const int VK_1 = int('1');
static const int VK_2 = int('2');
static const int VK_3 = int('3');
static const int VK_4 = int('4');
static const int VK_5 = int('5');
static const int VK_6 = int('6');
static const int VK_7 = int('7');
static const int VK_8 = int('8');
static const int VK_9 = int('9');
static const int VK_AT= int('@');
static const int VK_A = int('A');
static const int VK_B = int('B');
static const int VK_C = int('C');
static const int VK_D = int('D');
static const int VK_E = int('E');
static const int VK_F = int('F');
static const int VK_G = int('G');
static const int VK_H = int('H');
static const int VK_I = int('I');
static const int VK_J = int('J');
static const int VK_K = int('K');
static const int VK_L = int('L');
static const int VK_M = int('M');
static const int VK_N = int('N');
static const int VK_O = int('O');
static const int VK_P = int('P');
static const int VK_Q = int('Q');
static const int VK_R = int('R');
static const int VK_S = int('S');
static const int VK_T = int('T');
static const int VK_U = int('U');
static const int VK_V = int('V');
static const int VK_X = int('X');
static const int VK_Y = int('Y');
static const int VK_Z = int('Z');
static const int VK_Å = int('Å');
static const int VK_Ä = int('Ä');
static const int VK_Ö = int('Ö');