wn_screen_init(_c)

	status.i4.v = wn_screen_init(title.i1a.r [,hc_mode.i4.r]
				     [,default.i4.r])

	status.i4.v = wn_screen_init_c(title.i1a.r [,hc_mode.i4.v]
				       [,default.i4.v])

	This routine resets the current color graphics context, clears the
	window, and disables the cursor.  It also sets the title and
	default hardcopy mode of the graphic window which are used by the
	copies save/hardcopy system.  After a reset the drawing mode will
	will be set to WN_REPLACE mode, vector width will be set to 1,
	the vector/arc pattern will be solid, fill mode will be set to
	empty, and the text drawing mode will be set to erasive, normal
	video.  "title" is a character string which describes the information
	which will be written to the graphic window.

	title		null-terminated window title string (up to 39 chars)
	[hc_mode]	hard copy color mode
			(WN_HCMODE_DEFAULT -> image printed as is (default),
			 WN_HCMODE_REVERSED -> blue and yellow are reversed)
	[default]	return to default values flag
			(TRUE -> return to default values for background
				 window size and color depth,
			 FALSE -> leave background window size and color depth
				  at present values (default))

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid hard copy mode

	This function requires the following include files:

	clib_h, cbslib_h, acnet_errors_h

	Related functions:

	wn_select_screen(_c), wn_get_active_screen, wn_set_background_size_c,
	wn_set_background_format_c, wn_screen_title, wn_get_screen_title,
	intro_graphics_windows

	C/C++ usage:

	static const char	title[] = "Title";
	int	status;
	int	hc_mode = WN_HCMODE_DEFAULT;
	int	default = FALSE;

	status = wn_screen_init_c(title,hc_mode,default);