Public Event SizeChanged As SizeChangedEventHandler

Dim instance As ISDragableItemsControl
Dim handler As SizeChangedEventHandler
 
AddHandler instance.SizeChanged, handler

public event SizeChangedEventHandler SizeChanged

public event SizeChanged: SizeChangedEventHandler; 

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

public: __event SizeChangedEventHandler* SizeChanged

public:
event SizeChangedEventHandler^ SizeChanged