window_read_scroll_region_c

	status.i4.v = window_read_scroll_region_c(window_id.i2.v, top_row.i4.r,
						  bottom_row.i4.r)

	This routine allows the programmer to read the coordinates of
	region inside the window to be scrolled by future calls to
	window_scroll(_c).  A value of NULL can be passed for any
	returned argument that is not needed.

	window_id	window ID (use WMNGR_BACKGROUND for background window)
	top_row		returned top row to be scrolled
	bottom_row	returned bottom row to be scrolled

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid window ID or row value was specified
	CBS_NO_WINDOW		requested window does not exist

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_set_scroll_region_c, window_scroll(_c), window_scroll_page_c,
	window_scroll_to_top_c, window_scroll_to_bottom_c, window_tvm(_c),
	window_tvmx(_c), window_query_scroll(_c), window_total_lines_c,
	intro_tv_windows

	C/C++ usage:

	short	window_id;
	int	status;
	int	top_row;
	int	bottom_row;

	status = window_read_scroll_region_c(window_id,&top_row,&bottom_row);