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NAME
     tt_message_arg_val - return a pointer to the value of a mes-
     sage argument

SYNOPSIS
     #include <Tt/tt_c.h>
     char *tt_message_arg_val(Tt_message m,
                              int n);

DESCRIPTION
     The tt_message_arg_val() function returns a pointer  to  the
     value of the nth message argument.

     The m argument is the opaque handle for the message involved
     in  this  operation.   The  n  argument is the number of the
     argument to be returned.  The  first  argument  is  numbered
     zero.

RETURN VALUE
     Upon successful completion, the  tt_message_arg_val()  func-
     tion  returns  the  contents  for the message argument.  The
     application can use tt_ptr_error(3) to extract  one  of  the
     following Tt_status values from the returned pointer:

        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_NUM
                The integer value  passed  was  invalid  (out  of
                range).

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

APPLICATION USAGE
     The application can use tt_free(3) to free any  data  stored
     in the address returned by the ToolTalk API.

SEE ALSO
     tt_c(5), tt_ptr_error(3), tt_free(3).

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