title: Checkbox selected field from xml problem
body: <p>I am trying to set the selected value of a checkbox from a dataprovider (an xml file). </p>
  
  <pre><code>&lt;mx:DataGridColumn width="75" headerText="show/hide" dataField="@hidden"&gt;
                  &lt;mx:itemRenderer&gt;
                      &lt;mx:Component&gt;
                          &lt;mx:CheckBox  selected="{data.@hidden}" /&gt;
                      &lt;/mx:Component&gt;
                  &lt;/mx:itemRenderer&gt;
              &lt;/mx:DataGridColumn&gt;
  </code></pre>
  
  <p>The problem I am having is, I think, that it's not recognizing the attribute in the html as boolean  "hidden="false" or hidden="true". I can get the value, but how to I make it recognize the value as something other than a string?</p>