title: WiX burn custom BA - how to pause progress when Cancel command fires?
body: <p>Using a custom managed bootstrapper application, I am unable to get the setup progress to stop when the cancel button is clicked. I pull up a confirmation view with Yes/No options. Once cancellation has been confirmed, the setup rolls back just fine. Or, if declined, it continues along. This was done in accordance with:
  <a href="https://stackoverflow.com/questions/15323427/cancel-installation-and-rollback-using-wix-burn-boostrapper-ui">Cancel Installation and Rollback using wix burn Bootstrapper UI</a></p>
  
  <p>I noticed same problem also occurs in the WiX setup kit itself, where you could click cancel and wait, and the setup instead of waiting for user to confirm or decline cancellation, continues along.</p>
  
  <p>So, my question is, how do I pause the progress, until the Cancel command is confirmed (or declined) in the confirmation view?</p>
  
  <p><strong>Update:</strong> I am attempting to do this by the following mechanism:
  Add a new property called <code>CancelWaiting</code>. If <code>CancelWaiting</code> is true, then in the ProgressViewModel, change the logic such that the <code>&lt;PropertyChangedEventArgs&gt;.Result</code> is set to <code>Result.Suspend</code>. The challenge here is to do multiple command binding. The other way would be to combine the Cancel and CancelWaiting paths into one. Anyway, I'll update this thread once I get this going. If anyone has any other ideas, please do post.</p>