public static extern unsafe GpStatus GdipDrawLinesI( GpGraphics graphics, GpPen pen, Point *points, int count);
public static extern unsafe GpStatus GdipGetPenColor( GpPen pen, ARGB *argb);
public static extern GpStatus GdipDeletePen( GpPen pen);
public static extern GpStatus GdipSetPenColor( GpPen pen, ARGB argb);