#ifndef _NTIOAPI_H

typedef struct _FILE_DIRECTORY_INFORMATION
{
    ULONG NextEntryOffset;
    ULONG FileIndex;
    LARGE_INTEGER CreationTime;
    LARGE_INTEGER LastAccessTime;
    LARGE_INTEGER LastWriteTime;
    LARGE_INTEGER ChangeTime;
    LARGE_INTEGER EndOfFile;
    LARGE_INTEGER AllocationSize;
    ULONG FileAttributes;
    ULONG FileNameLength;
    _Field_size_bytes_(FileNameLength) WCHAR FileName[1];
} FILE_DIRECTORY_INFORMATION, *PFILE_DIRECTORY_INFORMATION;

#endif
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This structure is documented in Windows Driver Kit.

Structure FILE_DIRECTORY_INFORMATION is returned as a result of call NtQueryDirectoryFile with FileDirectoryInformation information class. It contains some typical information about directory entries.

NextEntryOffset

Offset (in bytes) of next FILE_DIRECTORY_INFORMATION structure placed in result buffer. If there's no more entries, NextEntryOffset is set to zero.

FileIndex

File index value, or zero, if directory indexing is not available.

CreationTime

Time of object creation.

LastAccessTime

Last access time. Means time when last open operation was performed.

LastWriteTime

Time of last write data.

ChangeTime

Time of last change.

EndOfFile

Specify length of file, in bytes.

AllocationSize

Specify real size of file on device. It must be equal or greater to EndOfFile member.

FileAttributes

Attributes of file.

FileNameLength

Length of FileName array, in bytes.

FileName[1]

UNICODE string specifying file name.

Documented by

Tomasz Nowak
Bo Branten

FILE_DIRECTORY_INFORMATION - NtDoc