Event handler
            
 Declaration Syntax
 Declaration Syntax| C# | Visual Basic | Visual C++ | 
public delegate void AddDocumentEventHandler( Object sender, AddDocumentEventArgs e )
Public Delegate Sub AddDocumentEventHandler ( _ sender As Object, _ e As AddDocumentEventArgs _ )
public delegate void AddDocumentEventHandler( Object^ sender, AddDocumentEventArgs^ e )
 Parameters
 Parameters- sender (Object)