How to register custom control in web.config file
<p>I have one custom control. I add reference to it on ASPX pages like this:</p>

<pre><code>&lt;%@ Register TagPrefix="cus" Namespace="Controls" %&gt;
</code></pre>

<p>at run time there is no error.</p>

<p>Error shown at deploy time</p>

<blockquote>
  <p>Unknown server tag
  'cus:GridHeaderFilter'.</p>
</blockquote>

<p>My custom control is in App_Code folder with name <code>GridHeaderFilter.vb</code></p>

<p>So how to add or register this custom control in <code>web.config</code> file</p>

<p>Thanks</p>
