mtext_ref_char -

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free
       Documentation License <http://www.gnu.org/licenses/fdl.html>.

Version 1.8.4                                    Mon Sep 25 2023                           mtext_ref_char(3m17n)

       Return the character at the specified position in an M-text. The mtext_ref_char() function returns the
       character at pos in M-text mt. If an error is detected, it returns -1 and assigns an error code to the
       external variable merror_code.

           MERROR_RANGE

       mtext_ref_char -

       int mtext_ref_char (MText * mt, int pos)