BY_HANDLE_FILE_INFORMATION

The BY_HANDLE_FILE_INFORMATION structure contains information retrieved by the GetFileInformationByHandle function.

typedef struct _BY_HANDLE_FILE_INFORMATION { // bhfi 
    DWORD    dwFileAttributes; 
    FILETIME ftCreationTime; 
    FILETIME ftLastAccessTime; 
    FILETIME ftLastWriteTime; 
    DWORD    dwVolumeSerialNumber; 
    DWORD    nFileSizeHigh; 
    DWORD    nFileSizeLow; 
    DWORD    nNumberOfLinks; 
    DWORD    nFileIndexHigh; 
    DWORD    nFileIndexLow; 
} BY_HANDLE_FILE_INFORMATION;

Members

dwFileAttributes

Specifies file attributes. This member can be one or more of the following values:

Attribute	Meaning
FILE_ATTRIBUTE_ARCHIVE
	The file or directory is an archive file. Applications use this attribute to mark files for backup or removal.
FILE_ATTRIBUTE_COMPRESSED
	The file or directory is compressed. For a file, this means that all of the data in the file is compressed. For a directory, this means that compression is the default for newly created files and subdirectories.
FILE_ATTRIBUTE_ENCRYPTED
	The file or directory is encrypted. For a file, this means that all of the data streams are encrypted. For a directory, this means that encryption is the default for newly created files and directories.
FILE_ATTRIBUTE_DIRECTORY
	The handle identifies a directory.
FILE_ATTRIBUTE_HIDDEN
	The file or directory is hidden. It is not included in an ordinary directory listing.
FILE_ATTRIBUTE_NORMAL
	The file has no other attributes. This attribute is valid only if used alone.
FILE_ATTRIBUTE_OFFLINE
	The file data is not immediately available. Indicates that the file data has been physically moved to offline storage.
FILE_ATTRIBUTE_READONLY
	The file or directory is read-only. Applications can read the file but cannot write to it or delete it. In the case of a directory, applications cannot delete it.
FILE_ATTRIBUTE_REPARSE_POINT
	The file has an associated reparse point.
FILE_ATTRIBUTE_SPARSE_FILE
	The file is a sparse file.
FILE_ATTRIBUTE_SYSTEM
	The file or directory is part of the operating system or is used exclusively by the operating system.
FILE_ATTRIBUTE_TEMPORARY
	The file is being used for temporary storage. File systems attempt to keep all the data in memory for quicker access, rather than flushing the data back to mass storage. A temporary file should be deleted by the application as soon as it is no longer needed.

ftCreationTime

Specifies the time the file was created. If the underlying file system does not support this time member, ftCreationTime is zero.

ftLastAccessTime

Specifies the time the file was last accessed. If the underlying file system does not support this time member, ftLastAccessTime is zero.

ftLastWriteTime

Specifies the last time the file was written to.

dwVolumeSerialNumber

Specifies the serial number of the volume that contains the file.

nFileSizeHigh

Specifies the high-order word of the file size.

nFileSizeLow

Specifies the low-order word of the file size.

nNumberOfLinks

Specifies the number of links to this file. For the FAT file system this member is always 1. For NTFS, it may be more than 1.

nFileIndexHigh

Specifies the high-order word of a unique identifier associated with the file.

nFileIndexLow

Specifies the low-order word of a unique identifier associated with the file. This identifier and the volume serial number uniquely identify a file. This number may change when the system is restarted or when the file is opened. After a process opens a file, the identifier is constant until the file is closed. An application can use this identifier and the volume serial number to determine whether two handles refer to the same file.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winbase.h.

BY_HANDLE_FILE_INFORMATION

Members

QuickInfo

See Also