VMS Help CC, Run-time functions, [w]erase  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Curses Screen Management function and macro that erase the window
  by painting it with blanks.  The erase macro acts on the stdscr
  window.

  Syntax:

       #include <curses.h>

       int erase();
       int werase(WINDOW *win);