title: Read combo selectvalue with Forms.Control
body: <p>In VB.Net I read my textbox with this line of code:</p>
  
  <pre><code>Me.GroupBox1.Controls("textbox" &amp; i).Text
  </code></pre>
  
  <p>But if I want to read a combobox with:</p>
  
  <pre><code>Me.GroupBox1.Controls("combobox" &amp; i).SelectedValue
  </code></pre>
  
  <p>I have an error because <code>SelectedValue</code> is not a member of <code>System.Windows.Forms.control</code></p>
  
  <p>What can I do to read a combobox dynamically?</p>