VMS Help TCPIP Services, Programming Interfaces, RPC XDR Routines, xdr_void  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    When there is no data to convert, this routine is passed to ONC
    RPC routines that require an XDR procedure parameter.
    Format
      #include  <tcpip$rpcxdr.h>
      bool_t  xdr_void();

1 - Description

    This routine is used as a placeholder for a program that passes
    no data in a remote procedure call. Most client and server
    routines expect an XDR routine to be called, even when there
    is no data to pass.

2 - Return Values

    This routine always returns TRUE.