window_last_horizontal_scroll

	num_columns.i4.v = window_last_horizontal_scroll()

	This routine returns the number of columns actually scrolled by
	the last window horizontal scroll command.  A negative value
	indicates a left scroll, and a positive value indicates a right scroll.

	This function returns status values as follows:

	number of columns scrolled

	This function requires the following include files:

	cbslib_h

	Related functions:

	window_query_scroll, window_hscroll_c, window_hscroll_page_c,
	window_scroll_to_left_c, window_scroll_to_right_c,
	window_set_parameter_c, window_last_scroll, window_total_lines_c,
	window_scroll(_c), window_scroll_page_c, window_scroll_to_bottom_c,
	window_scroll_to_top_c, intro_tv_windows

	C/C++ usage:

	int	num_columns;

	num_columns = window_last_horizontal_scroll();