This information class is used to query alternate name information for a file. The alternate name for a file is its 8.3 format name (8 characters that appear before the "." and 3 characters that appear after). This name exists for compatibility with MS-DOS and 16-bit versions of , which did not support longer file names or spaces within file names. A file MAY have an alternate name if its full name is not compliant with the restrictions for file names under MS-DOS and 16-bit .NTFS assigns an alternate name to a file whose full name is not compliant with restrictions for file names under MS-DOS and 16-bit unless the system has been configured through a registry entry to not generate these names to improve performance.The FILE_NAME_INFORMATION data element is as follows.
