title: OnTextChanged not working when used with AutoCompleteExtender
body: <p>I have a textbox as per below:</p>
  
  <pre><code>Search:&lt;asp:TextBox runat="server" ID="txtSearchCompany" AutoPostBack="true" OnTextChanged="txtSearchCompany_TextChanged"&gt;&lt;/asp:TextBox&gt;
  </code></pre>
  
  <p>I also have an <code>AutoCompleteExtender</code> linked with the textbox as per below:</p>
  
  <pre><code>&lt;cc1:AutoCompleteExtender ServiceMethod="SearchCustomers" 
              MinimumPrefixLength="2"
              CompletionInterval="100" EnableCaching="false" CompletionSetCount="10" 
              TargetControlID="txtSearchCompany"
              ID="AutoCompleteExtender1" runat="server" 
             CompletionListElementID="autocompleteDropDownPanel"
              &gt;
  &lt;/cc1:AutoCompleteExtender&gt;
  </code></pre>
  
  <p>When I choose something from the <code>AutoComplete</code> List, it does not fire the <code>onTextChanged</code> event. However, if I type something in the textbox and I don't select a value from the <code>AutoComplete</code> list, it then fires the <code>onTextChanged</code>.</p>
  
  <p>Can someone please tell me what this is happening?</p>
  
  <p>Thanks</p>