ROUTINE
-------

void ug_register_message (void (*ext_ug_message_routine) (FILE *, char *))

DESCRIPTION
-----------

Register an external routine to write UG_LIB standard output.

INPUT ARGUMENTS
---------------

ext_ug_message_routine : external routine name

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ROUTINE
-------

void ug_message (char *Text)

DESCRIPTION
-----------

Write a message to standard output.

INPUT ARGUMENTS
---------------

Text                     : Text string.
