status.i4.v = window_erase_c(window_id.i2.v [,erase_type.i4.v]

	This routine will erase the window specified by "window_id".

	window_id	window ID (use WMNGR_BACKGROUND for background window)
	[erase_type]	erase type
			(WMNGR_WHOLE_WINDOW -> erase entire window (default),
			 WMNGR_SCROLL_BUFFER -> erase scroll buffer only)
	[delete_scroll]	scroll buffer deletion flag
			(WMNGR_ERASE -> erase allocated scroll buffer text
			 WMNGR_DELETE -> delete allocated scroll buffer text)

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_WINDOW		requested window does not exist
	CBS_INVARG		invalid erase type requested

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_blank(_c), window_erase_line(_c), window_erase_to_eol_c,
	window_erase_to_eow_c, btvblnk(_c), window_delete_scroll_buffer_c,
	window_set_scroll_region_c, window_init_sequential_write_c,

	C/C++ usage:

	short	window_id;
	int	status;
	int	erase_type = WMNGR_WHOLE_WINDOW;
	int	delete_scroll = WMNGR_ERASE;

	status = window_erase_c(window_id,erase_type,delete_scroll);