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

  Provides an interface to the dynamic library loader to allow
  shareable images to be loaded and called at run time.

  The dlopen function does not load a shareable image but rather
  saves its pathname argument for subsequent use by the dlsym
  function, which actually loads the shareable image through a call
  to LIB$FIND_IMAGE_SYMBOL.

  Syntax:

       #include <stdio.h>

       void *dlopen(char *pathname, int mode);