|InfoPath Developer Reference|
Version Added: InfoPath 2003
The VersionUpgradeEvent object provides a number of properties that can be used within a version upgrade event to programmatically interact with a form's underlying XML document, determine the version numbers of the form and form template, and provide a response indicating the success of the version upgrade process.
The VersionUpgradeEvent object is passed as a parameter to the OnVersionUpgrade event of an InfoPath form. The properties that it provides are available only during this event.
For more information about using the VersionUpgradeEvent object, see Responding to form events.