Windows c++获取磁盘剩余容量

ULARGE_INTEGER freeBytesAvailable;
ULARGE_INTEGER totalNumberOfBytes;　　　　 //磁盘总字节
ULARGE_INTEGER totalNumberOfFreeBytes;　　//空闲字节
GetDiskFreeSpaceEx(L"path", &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes);//path可以是路径，不必须是盘符
ULONGLONG DiskFreeSpace=totalNumberOfFreeBytes.QuadPart;