VC++获取到Windows开机运行的时间，不是开机时间，而是从开机后到现在的运行时间，也就是一次开机所运行的时间，如果关机了，可能就不准确了。-The VC++ get to the Windows boot running time is not boot time, but from the boot to the running time, which is the time you turn on the running time, shutdown, and may not be a

api函数，获取系统时间，实现比较简单，上传加分撒-api function to get the system time, relatively simple, upload a plus Caesar