Application.CustomDictionaries (Word)
Returns a Dictionaries object that represents the collection of active custom dictionaries.
Active custom dictionaries are marked with a check in the Custom Dictionaries dialog box. For information about returning a single member of a collection, see Returning an object from a collection.
Dim dicHome As Dictionary
Set dicHome = CustomDictionaries.Add(Filename:="Home.dic")
Msgbox dicHome.Path & Application.PathSeparator & dicHome.Name