public virtual void DrawBackground(IGraphPort graphPort) { // Clear the backing buffer //GraphPort.DrawingColor = RGBColor.LtGray; graphPort.UseDefaultBrush(); graphPort.UseDefaultPen(); graphPort.SetDefaultBrushColor(RGBColor.LtGray); graphPort.SetDefaultPenColor(RGBColor.LtGray); graphPort.Rectangle(0, 0, fBounds.Width, fBounds.Height); }