private void DrawTodayCircle (Graphics dc, Rectangle rectangle) {
Color circle_color = Color.FromArgb (248, 0, 0);
// draw the left hand of the circle
Rectangle lhs_circle_rect = new Rectangle (rectangle.X + 1, rectangle.Y + 4, Math.Max(rectangle.Width - 2, 0), Math.Max(rectangle.Height - 5, 0));
Rectangle rhs_circle_rect = new Rectangle (rectangle.X + 1, rectangle.Y + 1, Math.Max(rectangle.Width - 2, 0), Math.Max(rectangle.Height - 2, 0));
Point [] curve_points = new Point [3];
curve_points [0] = new Point (lhs_circle_rect.X, rhs_circle_rect.Y + rhs_circle_rect.Height/12);
curve_points [1] = new Point (lhs_circle_rect.X + lhs_circle_rect.Width/9, rhs_circle_rect.Y);
curve_points [2] = new Point (lhs_circle_rect.X + lhs_circle_rect.Width/2 + 1, rhs_circle_rect.Y);
Pen pen = ResPool.GetSizedPen(circle_color, 2);
dc.DrawArc (pen, lhs_circle_rect, 90, 180);
dc.DrawArc (pen, rhs_circle_rect, 270, 180);
dc.DrawCurve (pen, curve_points);
dc.DrawLine (ResPool.GetPen (circle_color), curve_points [2], new Point (curve_points [2].X, lhs_circle_rect.Y));
}
