c++ read keyboard events windows

#include <iostream>
#include <string>
#include <Windows.h>
#include <thread>
#include <chrono>

using namespace std;
HANDLE hstdin;

int read_key()
{
    INPUT_RECORD event;
    if (WaitForSingleObject(hstdin, 0) == WAIT_OBJECT_0)
    {
        DWORD count;
        ReadConsoleInput(hstdin, &event, 1, &count);
        if (event.EventType == KEY_EVENT && !event.Event.KeyEvent.bKeyDown)
        {
            switch (event.Event.KeyEvent.wVirtualKeyCode)
            {
            case VK_LEFT:
                cout << "left" << endl;
                break;
            case VK_RIGHT:
                cout << "right" << endl;
                break;
            case VK_UP:
                cout << "up" << endl;
                break;
            case VK_DOWN:
                cout << "down" << endl;
                break;
            }
        }
    }
    return 0;
}

int main()
{
    DWORD   mode;
    hstdin = GetStdHandle(STD_INPUT_HANDLE);
    GetConsoleMode(hstdin, &mode);
    SetConsoleMode(hstdin, 0);

    for (;;)
    {
        read_key();
        this_thread::sleep_for(chrono::milliseconds(100));
    }

    SetConsoleMode(hstdin, mode);
    return 0;
};