SET(UNDEFINED_KEY)

 Determines the action taken when an undefined key-map key is used.

 Syntax

    SET (UNDEFINED_KEY, string [, action])

 Parameters

    string     The key-map list for the procedure.

    action     A string, buffer, range, or program specifying the action
               to be taken on an undefined key.  If you specify a string,
               buffer, or range,
               it is compiled.  The default is to display a message "Key
               has no definition."

 Example

 The following statements cause the default message for an undefined key to
 be
 displayed when an undefined key is used:

    IF GET_INFO ("tpu$key_map_list", "undefine_key") <> 0
       THEN
          SET (UNDEFINED_KEY, "tpu$key_map_list");
    ENDIF;