Assembly: Microsoft.Office.InfoPath (in microsoft.office.infopath.dll)
The code skeleton for an event handler associated with the VersionUpgrade event, which uses the VersionUpgradeEventHandler delegate, should be added only from the Microsoft Office InfoPath 2007 user interface. For more information on how to add event handlers in InfoPath, see How Do I: Add an Event Handler.
This type or member can be accessed from code running in forms opened in Microsoft Office InfoPath 2007 or in a Web browser.
For an example of using the VersionUpgradeEventHandler delegate, see the sample code in the VersionUpgrade event of the FormEvents class.