status.i4.v = window_to_back(window_id.i2.r)

	This routine pushes the window indicated by "window_id" to the back.

	window_id	window ID

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_WINDOW		requested window does not exist
	CBS_NOTENB		window moving is disabled
	CBS_MEMFAIL		failed in allocating dynamic memory

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_to_front, window_move_enable, window_move_disable,

	C/C++ usage:

	short	window_id;
	int	status;

	status = window_to_back(&window_id);