Public Event MouseRightButtonUp As MouseButtonEventHandler

Dim instance As ISTextBox
Dim handler As MouseButtonEventHandler
 
AddHandler instance.MouseRightButtonUp, handler

public event MouseButtonEventHandler MouseRightButtonUp

public event MouseRightButtonUp: MouseButtonEventHandler; 

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

public: __event MouseButtonEventHandler* MouseRightButtonUp

public:
event MouseButtonEventHandler^ MouseRightButtonUp