Public Event PlayButtonClick As RoutedEventHandler

Dim instance As UXFlowControlPanel
Dim handler As RoutedEventHandler
 
AddHandler instance.PlayButtonClick, handler

public event RoutedEventHandler PlayButtonClick

public event PlayButtonClick: RoutedEventHandler; 

In JScript, you can handle the events defined by another class, but you cannot define your own.

public: __event RoutedEventHandler* PlayButtonClick

public:
event RoutedEventHandler^ PlayButtonClick