status.i4.v = cmu_send(mailbox_name.i1a.r, message.i1a.r,
			       message_length.i4.v [,dest_name.i1a.r])

	This routine will send a message to a mailbox.  The program should
	have previously connected to this mailbox by calling cmu_connect. 

	mailbox_name	mailbox name (CMU_NAMLEN characters)
	message		mail message buffer
	message_length	size of message in bytes
	[dest_name]	CMU_NAMLEN character string indicating the
			destination of the message
			(default is NULL which results in a destination
			 name of "NO_DESTINATN")

	This function returns ACNET status values as follows:

	OK			success
	CMU_NOMB		not connected to this mailbox
	CMU_ILLEN		invalid message length
	CMU_MBFULL		mailbox is full
	CMU_SYSERR		Unix system error

	This function requires the following include files:

	clib_h, acnet_errors_h

	Related functions:

	cmu_receive, cmu_connect, cmu_disconnect, cmu_empty_box

	C/C++ usage:

	static const char	mailbox_name[CMU_NAMLEN+1] = "mailbox_name";
	static ocnst char	message[] = "This is a message to send.";
	char	*dest_name = NULL;
	int	status;
	size_t	message_length = sizeof(message);

	status = cmu_send(mailbox_name,message,message_length,dest_name);