title: Control position inside Windows.Forms.Panel with autoscroll
body: <p>Control.Location doesn't take into account the slider position of the parent panel control and returns the value like if there was no scrollbar. So how to obtain the real position of some control inside scrollable panel?
  For example here I never get the real location of my button:</p>
  
  <pre><code>Button button;
          public Form1()
          {
              InitializeComponent();
              panel1.Height = 200;
              panel1.AutoScrollMinSize = new Size(0, 2000);
              button = new Button();
              panel1.Controls.Add(button);
              button.Top = 1500;
              button.Click += new EventHandler(button_Click);
          }
  
          void button_Click(object sender, EventArgs e)
          {
              MessageBox.Show(button.Location.Y.ToString());
          } 
  </code></pre>