private void UpdateAreaPolygonSample()
{
// Draw line to screen.
Graphics MyGraphics = this.panelAreaPolygonColor.CreateGraphics();
panelAreaPolygonColor.Refresh();
SolidBrush myBrush = new SolidBrush(Color.FromName(this.comboBoxAreaPolygonColorChoice.Text));
Point[] MyPoints = { new Point(10, 10), new Point(10, 40), new Point(40, 40), new Point(40, 10), new Point(10, 10) };
MyGraphics.FillPolygon(myBrush, MyPoints);
MyGraphics.Dispose();
myBrush.Dispose();
}