Public Event NativeDragEnter As DragEventHandler

Dim instance As ISDragableHeaderedSelectionControl
Dim handler As DragEventHandler
 
AddHandler instance.NativeDragEnter, handler

public event DragEventHandler NativeDragEnter

public event NativeDragEnter: DragEventHandler; 

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

public: __event DragEventHandler* NativeDragEnter

public:
event DragEventHandler^ NativeDragEnter