files_in ("", (pchar name) {                                                   /* "ERR_EMPTY_DIRECTORY_NAME" */
                             ...
                           });

files_in ("?*><", (pchar name) {                                               /* "ERR_INCORRECT_DIRECTORY_NAME" */
                                 ...
                               });

files_in ("./random/directory/name", (pchar name) {                            /* "ERR_DIRECTORY_NOT_EXISTS" */
                                                    ...
                                                  });

