title: AIR dispatch event with parameter
body: <p>I have a form with a search field.
  When user press enter key, I use httpservice to send a query to mySQL database.
  In some case (a lot) there are several record, so a new window is opening to show those record with a datagrid to let user chose the good result.</p>
  
  <p>My problem is how to send selected information to the first window (with text field).
  I gess that dispatch event is the way but I don't found how to use!</p>
  
  <p>Can you help me to find a solution.</p>
  
  <p>Thanks</p>