private void FormMain_MouseDown(object sender, MouseEventArgs e)
{
tree.selectNode = tree.FindNode(tree.top, e.X, e.Y);
drawing = tree.selectNode != null;
}
private void FormMain_MouseDown(object sender, MouseEventArgs e)
{
tree.selectNode = tree.FindNode(tree.top, e.X, e.Y);
drawing = tree.selectNode != null;
}