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

  Curses Screen Management function and macro that erase the contents
  of the specified window and reset the cursor to coordinates (0,0).
  The clear macro acts on the stdscr window.

  Syntax:

       #include <curses.h>

       int clear();
       int wclear(WINDOW *win);