Public Delegate Sub PropertyTranslator ( _
    host As Object, _
    propertyName As String, _
    value As Object _
)

Dim instance As New PropertyTranslator(AddressOf HandlerMethod)

public delegate void PropertyTranslator(
    Object host,
    string propertyName,
    Object value
)

public delegate void PropertyTranslator(
    Object^ host, 
    String^ propertyName, 
    Object^ value
)

JScript does not support delegates.

In XAML, you can use delegates but you cannot define your own.