'Declaration
Public Event ViewerMouseDown As GdViewer.ViewerMouseDownEventHandler
public event GdViewer.ViewerMouseDownEventHandler ViewerMouseDown
public event ViewerMouseDown: GdViewer.ViewerMouseDownEventHandler;
In JScript, you can handle the events defined by another class, but you cannot define your own.
public: __event GdViewer.ViewerMouseDownEventHandler* ViewerMouseDown
public: event GdViewer.ViewerMouseDownEventHandler^ ViewerMouseDown