title: Who is calling VisualStateManager.GoToState behind the scenes?
body: <p>I am a newbie to xaml and windows app dev so sorry if this question might seem silly.</p>
  
  <p>I created a textbox and in the designer I right clicked it and selected edit template=>edit a copy and put it into my custom dictionary.</p>
  
  <p>In the control template for this textbox I saw visual states like disabled,focused and so on. And I modified them and run the mobile app and observed that my changes work like changing border color when textbox is focused.</p>
  
  <p>But in order for this to work somebody has to call </p>
  
  <p><code>VisualStateManager.GoToState("Focused")</code> </p>
  
  <p>when the textbox is focused so who is calling this because I don't see any visual transitions in the control template so how is this happening?</p>