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NAME
     tt_message_context_bval - retrieve the byte-array value  and
     length of a message's context

SYNOPSIS
     #include <Tt/tt_c.h>
     Tt_status tt_message_context_bval(Tt_message m,
                                       const char *slotname,
                                       unsigned char **value,
                                       int *len);

DESCRIPTION
     The tt_message_context_bval() function retrieves  the  byte-
     array value and length of a message's context.

     If there  is  no  context  slot  associated  with  slotname,
     tt_message_context_bval() returns a NULL pointer in slotname
     and zero in len.

     The m argument is the opaque handle for the message involved
     in this operation.  The slotname argument describes the con-
     text of this message.  The  value  argument  points  to  the
     location  to  return  the  value.   The  len argument is the
     length of the value in bytes.

RETURN VALUE
     Upon successful  completion,  the  tt_message_context_bval()
     function  returns  the status of the operation as one of the
     following Tt_status values:

        TT_OK   The operation completed successfully.

        TT_ERR_NOMP
                The ttsession(1) process is not running  and  the
                ToolTalk service cannot restart it.

        TT_ERR_POINTER
                The pointer passed does not point to an object of
                the correct type for this operation.

        TT_ERR_SLOTNAME
                The specified slotname is syntactically invalid.

SEE ALSO
     tt_c(5).

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