Public Event ContentSizeChanged As SizeChangedEventHandler

Dim instance As ExpandableContentPresenter
Dim handler As SizeChangedEventHandler
 
AddHandler instance.ContentSizeChanged, handler

public event SizeChangedEventHandler ContentSizeChanged

public event ContentSizeChanged: SizeChangedEventHandler; 

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

public: __event SizeChangedEventHandler* ContentSizeChanged

public:
event SizeChangedEventHandler^ ContentSizeChanged