tv_paste_callback_add

   	status.i4.v = tv_paste_callback_add(paste_handler.f.v
					    [,callback_data.g.v])

	This function will register the routine "paste_handler" to be
   	called when the user requests a paste operation in the TV window.
   	
   	paste_handler	handler function which is called when the user
   	    	    	does a paste operation (Ctrl-v) or a device paste
			operation (F12).  To be called 	as follows:
			  int paste_handler(int row, int column, int length,
					    char *paste_text,
					    void *callback_data)
			This function should return TRUE if it has handled
   	    	    	the paste operation.
	[callback_data]	pointer to user-supplied data to be passed to
			the paste handler function (default is NULL)

	This function returns ACNET status values as follows:

	OK			success
	CLIB_DUPREQ		requested handler is already registered

	This function requires the following include files:

	clib_h, acnet_errors_h

	Related functions:

	tv_paste_callback_remove

	C/C++ usage:

	int	status;
	int	paste_handler(int row, int column, int length,
			      char *paste_text, void *callback_data);
	void	*callback_data = (void *) NULL;

   	status = tv_paste_callback_add(paste_handler,callback_data);