window_current_row_c

	status.i4.v = window_current_row_c(window_id.i2.v, row.i4.v,
					   current_row.i4.r)

	This routine allows the programmer to calculate the current row
	in scrolling window that had an original value of "row".

	window_id	ID of desired window
	row		original window row number
	current_row	returned current window row

	This function returns status values as follows:

	OK			success
	CBS_INVARG		invalid window ID or row
	CBS_NO_WINDOW		window doesn't exist

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_row_to_entry_c, window_entry_to_row_c, window_last_io_location_c,
	window_is_in_scroll_buffer_c, window_next_scroll_row_c,
	window_scroll(_c), window_tvm(_c), window_tvmx(_c),
	window_virtual_column_c, window_physical_column_c, window_hscroll_c

	C/C++ usage:

	short	window_id;
	int	status;
	int	row = ROW;
	int	current_row;

	status = window_current_row_c(window_id,row,&current_row);