public static extern GpStatus GdipFillEllipseI( GpGraphics graphics, GpBrush brush, int x, int y, int width, int height);
public static extern unsafe GpStatus GdipDrawLinesI( GpGraphics graphics, GpPen pen, Point *points, int count);
public static extern GpStatus GdipDeleteGraphics( GpGraphics graphics);
public static extern GpStatus GdipSetSmoothingMode( GpGraphics graphics, SmoothingMode smoothingMode);
public static extern GpStatus GdipGraphicsClear( GpGraphics graphics, ARGB color);