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

  Initializes a variable to the beginning of the argument list.

  Syntax:

  Nonportable format:

       #include <varargs.h> (Compaq C Extension)

       void va_start(va_list ap);

  Portable format:

       #include <stdarg.h> (ANSI C)

       void va_start(va_list ap, parmN);