/sys$common/syshlp/helplib.hlb CC, Run-time functions, mv[w]inch  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Curses Screen Management macros that move the cursor to coordinates
  (y,x) and return the character on the specified window without
  making changes to the window.  The mvinch macro acts on the stdscr
  window.

  Syntax:

       #include <curses.h>

       int mvinch(int y, int x);
       int mvwinch(WINDOW *win, int y, int x);