tt_prequest_create(library call)										  tt_prequest_create(library call)

NAME

       tt_prequest_create -- create a procedure request message

SYNOPSIS

       #include <Tt/tt_c.h>
       Tt_message tt_prequest_create(
       Tt_scope scope,
       const char *op);

DESCRIPTION

       The tt_prequest_create function creates a message.  The created message created contains the following:

       Tt_address = TT_PROCEDURE Tt_class = TT_REQUEST

       The application can use the returned handle to add arguments and other attributes, and to send the message.

       The scope argument determines which processes are eligible to receive the message.  The following values are defined:

       TT_SESSION
		 All processes joined to the indicated session are eligible.

       TT_FILE	 All processes joined to the indicated file are eligible.

       TT_BOTH	 All processes joined to either indicated file or the indicated session are eligible.

       TT_FILE_IN_SESSION
		 All processes joined to both the indicated file and the indicated session are eligible.

       The op argument is the operation to be performed by the receiving process.

RETURN VALUE

       Upon  successful  completion,  the tt_prequest_create function returns the unique handle that identifies this message.  The application can
       use tt_ptr_error(3) to extract one of the following Tt_status values from the returned handle:

       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_PROCID
		 The specified process identifier is out of date or invalid.

APPLICATION USAGE

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

       If the ToolTalk service is unable to create a message when requested, tt_prequest_create returns an invalid handle.  When  the  application
       attempts to use this handle with another ToolTalk function, the ToolTalk service will return TT_ERR_POINTER.

SEE ALSO

       Tt/tt_c.h - Tttt_c(5), tt_ptr_error(3), tt_free(3).

														  tt_prequest_create(library call)