title: How to change checkbox value on deselect?
body: <p>I`m having trouble finding out how to change the value of a checkbox (=property) on deselect.</p>
  
  <p>What I`ve got this far:</p>
  
  <pre><code>&lt;Property Id="INSTALLEXCEL2007" /&gt;
  
  &lt;Control Type="CheckBox" Id="Excel2007_Checkbox" Width="88" Height="17" X="22" Y="120" Text="Excel 2007" Property="INSTALLEXCEL2007" CheckBoxValue="1" /&gt;
  </code></pre>
  
  <p>The code says that the property <code>INSTALLEXCEL2007</code> will get the value <code>1</code>, if the user checks it. 
  Now, if it is unchecked, the value still remains <code>1</code>. Meaning, each click on the checkbox assigns the value <code>1</code> to this property. </p>
  
  <p>Is there any way to have a "unchecked value"?</p>
  
  <p>I have already tried <a href="http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/How-to-conditionally-check-uncheck-a-checkbox-td5539262.html" rel="nofollow">this</a>, but it didn`t work in my case.</p>