GetAsyncKeyState 获取键盘按键消息

#include <Windows.h>
#include <iostream>
using namespace std;

int main()
{
    while(true)
    {
        if(-32767 == GetAsyncKeyState('A')) //不支持大小写识别
        {
            cout<<"您按下A键"<<endl;
        }
        if(-32767 == GetAsyncKeyState('B'))
        {
            cout<<"您按下B键"<<endl;
        }
        if(-32767 == GetAsyncKeyState(VK_RETURN))
        {
            cout<<"您按下回车键"<<endl;
        }
    }
    return 0;
}