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

  Curses Screen Management routine that moves all the lines on the
  window up one line.  The top line scrolls off the window and the
  bottom line becomes blank.

  Syntax:

       #include <curses.h>

       int scroll(WINDOW *win);