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

    Serializes and deserializes unsigned characters.
    Format
      #include  <tcpip$rpcxdr.h>
      bool_t  xdr_u_char(XDR *xdrs, char *ucp);

1 - Arguments

 xdrs
    A pointer to an XDR stream handle created by one of the XDR
    stream handle creation routines.
 ucp
    A pointer to a character.

2 - Description

    A filter primitive that translates between internal
    representation of unsigned characters and their XDR
    representations.

3 - Return Values

    TRUE               Indicates success.
    FALSE              Indicates failure.