ItemEvents_10_Event.PropertyChange event

Occurs when an explicit built-in property of an instance of the parent object is changed.

Namespace:  Microsoft.Office.Interop.Outlook
Assembly:  Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)

Event PropertyChange As ItemEvents_10_PropertyChangeEventHandler
Dim instance As ItemEvents_10_Event
Dim handler As ItemEvents_10_PropertyChangeEventHandler

AddHandler instance.PropertyChange, handler

The property name is passed to the event so that you can determine which property was changed.