title: WPF global open/close dialog event?
body: <p>In my WPF application I would like to subscribe to some event/callbeck/whatever that tells me whenever a dialog window opens (and closes) in my application.</p>
  
  <p>I found the window collection but this is a simple container and it doesn't seem to provide any means of subscription.</p>
  
  <p>I also tried using event handlers but there seems not be an event that tells me what I need.</p>
  
  <p>Any ideas?</p>