The VPLUS intrinsics can be called from programs written in
any of the supported programming languages listed in Appendix A.
Additionally, some languages (also listed in Appendix A) provide
the programmer with a special interface with terminals and forms,
as described in their respective reference manuals. With these languages,
the programmer does not call the VPLUS intrinsics directly. Instead,
the programmer specifies the statements appropriate to the special
interface. Each of the supported programming languages calls the
VPLUS intrinsics with the same parameters, and these parameters are
essentially the same type and size. So that the intrinsics can adjust
to any peculiarities of the calling programming language, one input
sub-parameter specifies the language of the calling program.
