A hard link points or references to a specific space on the hard drive. Multiple files can be hard linked to the same space in the hard drive. If some data is changed on one of the hard linked files, all the other files reflect that change. The HARDLINKFILE function returns the hard link file's command status. On successful execution of this function: 0 is returned; on failure: an operating system-specific error code is returned.

HARDLINKFILE(single-text-expression, single-text-expression, single-text-expression, single-text-expression)
HARDLINKFILE [oldpath, newpath, number_of_retries (max 100), pause_between_retries_in_ms (max 100000)]
A single number