private void button11_MouseMove(object sender, MouseEventArgs e)
{
if (sender is Button)
((Button)sender).Focus();
CardinalPoint tmp = value;
if (sender == button10)
tmp = CardinalPoint.Centroid;
else if (sender == button11)
tmp = CardinalPoint.ShearCenter;
else if (e.X < 78 && e.Y < 78)
tmp = Points[e.Y / 26][e.X / 26];
if (tmp != value)
{
value = tmp;
Console.WriteLine(value);
Invalidate();
}
}