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