status.i4.v = wn_circle_pixel_c(x.i4.v, y.i4.v, radius.i4.v

	This routine draws a circle at the specified pixel
	coordinates.  The coordinates can either be absolute
	screen coordinates or relative to a graphical window
	specified by a previous call to wn_active(_c).  The
	color of the circle is determined by the most recent
	call to wn_color(_c).  The width of an unfilled circle
	is determined by the most recent call to wn_border_width_c.
	Whether the circle is filled or not is determined by the
	most recent call to wn_fill_mode(_c).

	x, y		pixel coordinates of the circle
	radius		radius of the circle in pixels
	[relative_pos]	flag indicating whether the coordinates should
			be interpreted as full screen coordinates or
			if they are relative to the active window
			(TRUE -> coordinates are relative to the active window,
			 FALSE -> coordinates are absolute screen coordinates

	This function returns ACNET status values as follows:

	OK			success
	CBS_NOSETUP		an active window has not been established

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	wn_circle(_c), wn_color(_c), wn_user_defined_color_c,
	wn_read_user_defined_color, wn_fill_mode(_c), wn_border_width_c,
	wn_flush, intro_graphics_windows

	C/C++ usage:

	int	status;
	int	x = 10;
	int	y = 10;
	int	radius = 5;
	int	relative_pos = FALSE;

	status = wn_circle_pixel_c(x,y,radius,relative_pos);