status.i4.v = window_delete_line_c(window_id.i2.v, row.i4.v)

	This routine deletes a line at the indicated row in the scroll
	buffer and scrolls up the lines below it.

	window_id	window ID (use WMNGR_BACKGROUND for background window)
	row		deletion row

	This function returns status values as follows:

	CBS_NODAT		attempted to delete last line in scroll buffer
	TRUE			line was successfully deleted
	FALSE			line delete failed

	This function requires the following include files:

	cnsparam_h, cbslib_h, acnet_errors_h

	Related functions:

	window_delete_char_c, window_insert_line_c, window_insert_char_c,
	window_enable_scroll_io(_c), window_disable_scroll_io_c,
	window_entry_to_row_c, window_row_to_entry_c, intro_tv_windows

	C/C++ usage:

	short	window_id;
	int	status;
	int	row = 1;

	status = window_delete_line_c(window_id,row);