C# WPF DynamicDataDisplay控件的坐标设置，求指点

        private void btn_MouseWheel_1(object sender, MouseWheelEventArgs e)
        {
            Button btn = sender as Button;
            if (btn.Width > 10 && btn.Width < 100)
            {
                if (e.Delta < 0)
                {
                    btn.Width += 10;
                }
                else
                {
                    btn.Width -= 10;
                }
            }
        }