Drop Down Widget Focus Events

I'm using Captivate 8 and the Drop Down Learning Interaction on a Responsive Design project publishing in HTML5. I want to detect when the Drop Down has been accessed so that I can query the result and proceed depending on what it is. There is however no Lost Focus event associated with the widget (or any event that I can see). I've tried putting a click box on the same place as the widget (both above and below) but both objects never work together in either of these situations. Does anyone know how I can get around this problem?

Message was edited by: Helen Richmond I have found a solution to this. By using the Common JS Interface and placing a CPAPI_VARIABLEVALUECHANGED event listener onto the variable that the Drop Down uses I can effectively detect a change event on the drop down. Although this only fires when the variable changes it's enough to do what I need.