title: What event is rised when changing between two BorderContainers using TabBar component?
body: <p>I am developing Adobe Air desktop application using Apache Flex 4.9.1 SDK. 
  I am using a TabBar control in order to go through different windows. For a window I am using a BorderContainer control. </p>
  
  <p>My question is:</p>
  
  <p>Is there any event raised(in the BorderContainer control not in the TabBAr control) when you change from one window to another using the tabs. The event in TabBar is "change", but I need to capture this moment in the BorderContainer. I have tried "FocusOut", "Hide", "Deactive" events, but they are not raised. So does anybody knows what is happening in the BorderContainer when the tab is changed?</p>
  
  <p>Thank you in advance!</p>