status.i4.v = wn_point_set(num_points.i4.r, xy.r4a.r)

	This routine plots num_points points at a time at virtual coordinates
	X,Y in a graphical window specified by a previous call to
	wn_active(_c).  wn_view(_c) and wn_world(_c) must also be called
	before calling this routine.  The color of the points is determined
	by the most recent call to wn_color(_c).

	num_points		number of points
	xy			array of x-y pairs in real world coordinates 

	This function returns status values as follows:

	CBS_NOSETUP		an active window has not been established
	CBS_MEMFAIL		failed in allocating dynamic memory
	otherwise		number of plotted points that were out of range

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	wn_point(_c), wn_symbol(_c), wn_view(_c), wn_world(_c), wn_active(_c),
	wn_color(_c), wn_user_defined_color_c, wn_read_user_defined_color,
	wn_connect_points(_c), wn_plot_fill(_c), wn_flush,

	C/C++ usage:

	int	status;
	int	num_points = NUM_POINTS;
	static const float	xy[NUM_POINTS*2] = {1.0, 3.0, 9.0, 7.0};

	status = wn_point_set(&num_points,xy);