status.i4.v = wn_delete_all_c([erase_it.i4.v] [current_only.i4.v])

	This routine deletes all windows created by earlier calls to

	[erase_it]	(TRUE -> erase windows,
			 FALSE -> don't erase windows (default))
	[current_only]	(TRUE -> only delete windows on the currently
				 active screen (established by the most
				 recent call to wn_select_screen(_c)),
			 FALSE -> delete windows on all screens (default))

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_WINDOW		no windows exist

	This function requires the following include files:

	cnsparam_h, cbslib_h, acnet_errors_h

	Related functions:

	wn_delete_c, wn_view(_c), wn_erase(_c), wn_select_screen(_c),

	C/C++ usage:

	int	status;
	int	erase_it = TRUE;
	int	current_only = FALSE;

	status = wn_delete_all_c(erase_it,current_only);