Saves an item to the archive database.
AFTKN_ITEM_ARCHIVE or 785
VOID ItemArchive([ANSISTRING MessageID])
(Optional) Unique item identifier, returned by ItemMessageIDFromView(). If not specified, archives the selected item.
IMPORTANT: This token behaves like ItemArchiveOpenItem if no MessageID parameter is used. It also unarchives an item if in "Open Archive" mode. A selected item and using X00 as the MessageID work in both client states of regular and Open Archive mode. An item's MessageID changes after being archived and changes again when unarchived. The original MessageID is not used again when unarchived.