title: Disable Wix Custom action on /quiet /silent
body: <p>In a WIX custom action, is there a way to detect whether the MSI was invoked with /silent or /quiet command line switches? Basically what I want is to not execute the custom action (since it shows a form) or handle it differently if these command line switches were passed but I am unable to find this out.</p>
  
  <p>Is there a way to possibly detect it?</p>