How can I access the controls in a listbox control generated by an itemtemplate
<p>I have a listbox and a dataTemplate defined like so:</p>

<pre><code>    &lt;Window.Resources&gt;
    &lt;DataTemplate x:Key="propertyTemplate"&gt;
        &lt;StackPanel Margin="8" Orientation="Horizontal"&gt;
            &lt;CheckBox Name="Chosen"/&gt;
            &lt;TextBlock Text="{Binding Path=MAP}" Margin="10,0,0,0"/&gt;
        &lt;/StackPanel&gt;
    &lt;/DataTemplate&gt;
   &lt;/Window.Resources&gt;
        &lt;ListBox x:Name="listBox" HorizontalAlignment="Left" Height="100"     Margin="388,203,0,0" VerticalAlignment="Top" Width="522"
             ItemsSource="{Binding}"
             ItemTemplate="{StaticResource propertyTemplate}"/&gt;
</code></pre>

<p>I populate the listbox using a linq query:</p>

<pre><code>Dim propertyList = (from a In db.properties
               select a).ToList()
listbox.datacontext = propertyList
</code></pre>

<p>I want to check and set the value of the "Chosen" checkbox for each item in the listbox.  Is there a way for me to do this?</p>