FltParseFileNameInformation function (fltkernel.h)

FltParseFileNameInformation parses the contents of a FLT_FILE_NAME_INFORMATION structure.


NTSTATUS FLTAPI FltParseFileNameInformation(
  [in, out] PFLT_FILE_NAME_INFORMATION FileNameInformation


[in, out] FileNameInformation

Pointer to an FLT_FILE_NAME_INFORMATION structure returned by a previous call to FltGetDestinationFileNameInformation, FltGetFileNameInformation, FltGetFileNameInformationUnsafe, or FltGetTunneledName. This parameter is required and cannot be NULL.

Return value

FltParseFileNameInformation returns STATUS_SUCCESS or an appropriate NTSTATUS error code.


FltParseFileNameInformation parses the Name member of a FLT_FILE_NAME_INFORMATION structure and uses the results to set the values of the Volume, Share, Extension, Stream, FinalComponent, ParentDir, and NamesParsed members of this structure. For more information, see FLT_FILE_NAME_INFORMATION.

The following is an example of a normalized name for a remote file:

\Device\LanManRedirector\MyServer\MyShare\Documents and Settings\MyUser\My Documents\Test Results.txt:stream1

FltParseFileNameInformation parses this normalized name as follows:

Volume: "\Device\LanManRedirector"

Share: "\MyServer\MyShare"

Extension: "txt"

Stream: ":stream1"

FinalComponent: "Test Results.txt:stream1"

ParentDir: "\Documents and Settings\MyUser\My Documents"

The following is an example of an opened name for a local file:

\Device\HarddiskVolume1\Docume~1\MyUser\My Documents\TestRe~1.txt:stream1:$DATA

FltParseFileNameInformation parses this opened name as follows:

Volume: "\Device\HarddiskVolume1"

Share: NULL

Extension: "txt"

Stream: ":stream1:$DATA"

FinalComponent: "TestRe~1.txt:stream1:$DATA"

ParentDir: "\Docume~1\MyUser\My Documents"

The following is an example of a short name for a file:


FltParseFileNameInformation parses this short name as follows:

Volume: NULL

Share: NULL

Extension: "txt"

Stream: NULL

FinalComponent: "TestRe~1.txt"

ParentDir: NULL

The caller must not modify the contents of the FileNameInformation structure, because the Filter Manager caches this structure so that all minifilter drivers can use it.

Note  If the caller is trying to parse a string, not an FLT_FILE_NAME_INFORMATION structure, use the FltParseFileName routine instead of FltParseFileNameInformation.


Minimum supported client Available in Windows XP SP2 and later versions of the Windows operating system.
Target Platform Universal
Header fltkernel.h (include Fltkernel.h)
Library FltMgr.lib
DLL Fltmgr.sys

See also