import_type

Copy information from type library to database
   Copy structure, union, or enum definition from the type library
   to the IDA database.
        idx       - the position of the new type in the list of
                    types (structures or enums)
                    -1 means at the end of the list
        type_name - name of type to copy
   returns: BADNODE-failed, otherwise the type id
                (structure id or enum id)

long import_type(long idx, string type_name);