Public Event TextInput As TextCompositionEventHandler

Dim instance As UXSelectorItem
Dim handler As TextCompositionEventHandler
 
AddHandler instance.TextInput, handler

public event TextCompositionEventHandler TextInput

public event TextInput: TextCompositionEventHandler; 

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

public: __event TextCompositionEventHandler* TextInput

public:
event TextCompositionEventHandler^ TextInput