window_coords(_c)

	status.i4.v = window_coords(window_id.i2.r, left_column.i4.r,
				    top_row.i4.r, right_column.i4.r,
				    bottom_row.i4.r)

	status.i4.v = window_coords_c(window_id.i2.v, left_column.i4.r,
				      top_row.i4.r, right_column.i4.r,
				      bottom_row.i4.r)

	This routine returns the screen coordinates for the window
	indicated by "window_id".  If any coordinate value is not needed,
	a value of NULL may be passed for that argument.  (Note:  If
	the requested window does not exist, a value of 0 will be
	returned for all coordinate values.)

	window_id	window ID (use WMNGR_BACKGROUND for background window)
	left_column	returned left column of the window
			(full screen coordinates)
	top_row		returned top row of the window
			(full screen coordinates)
	right_column	returned right column of the window
			(full screen coordinates)
	bottom_row	returned bottom row of the window
			(full screen coordinates)

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid number of columns or window ID
	CBS_NO_WINDOW		requested window does not exist

	This function requires the following include files:

	cnsparam_h, cbslib_h

	Related functions:

	window_coordinate_limits_c, window_read_scroll_region_c,
	window_set_scroll_region_c, screen_row(_c), screen_column(_c),
	intro_tv_windows

	C/C++ usage:

	short	window_id;
	int	status;
	int	left_column;
	int	top_row;
	int	right_column;
	int	bottom_row;

	status = window_coords_c(window_id,&left_column,&top_row,
				 &right_column,&bottom_row);