/sys$common/syshlp/helplib.hlb CC, Run-time functions, [no]crmode  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Curses Screen Management macros that set and unset the terminal
  from cbreak mode.  This mode of single-character input is only
  supported with the Curses input routine getch.

  Syntax:

       #include <curses.h>

       crmode()
       nocrmode()