If the structure was not allocated to use named entries or keyed entries, the newly created entry will be placed on the list specified by MOVETOLIST at the head or tail as specified by MOVETODIRECTION.

If the structure was allocated to use named entries, the entry name specified for ENTRYNAME is assigned to the newly created list entry, provided a list entry does not already exist with the same entry name. The newly created entry will be placed on the list specified by MOVETOLIST at the head or tail as specified by MOVETODIRECTION.