The time is calculated and converted to 64-bit in the first and second lines and then converted to local time zone before being converted to a SYSTEMTIME structure. Last of all the system time is set.

判断系统是硬盘、移动磁盘、还是光驱，哈可以判断操作系统是32位还是64位的系统-Judging system disk, removable disk, or drive, ha can determine whether the operating system is 32 bit or 64 bit