GetDiskFreeSpaceEx("c:\\", lpAvailable, lpTotal, lpFree);结果全是0，什么原因？

Question

GetDiskFreeSpaceEx("c:\\", lpAvailable, lpTotal, lpFree);结果全是0，什么原因？

Answer 1

__int64 Available(0);
__int64 Total(0);
__int64 Free(0);
GetDiskFreeSpaceExe("C:\\",(ULARGE_INTGER)&Available,(ULARGE_INTGER)&Total,(ULARGE_INTGER)&Free);

Answer 2

BOOL GetDiskFreeSpaceEx(
  LPCTSTR lpDirectoryName,                 // pointer to the directory name
  PULARGE_INTEGER lpFreeBytesAvailableToCaller, // receives the number of bytes on
                                                // disk available to the caller
  PULARGE_INTEGER lpTotalNumberOfBytes,    // receives the number of bytes on disk
  PULARGE_INTEGER lpTotalNumberOfFreeBytes // receives the free bytes on disk
);Note that lpDirectoryName does not have to specify the root directory on a disk. The function accepts any directory on the disk

Answer 3

GetDiskFreeSpaceExe("C:\\",(PULARGE_INTEGER)&Available......
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