|InfoPath Developer Reference|
Version Added: InfoPath 2003
The DocActionEvent object provides a number of properties that can be used within a button click event to programmatically interact with the data in a form's underlying XML document and to control the success or failure of the event.
The DocActionEvent object is passed as a parameter to the OnClick event button that is contained in a view of an InfoPath form. Its properties are available only during the OnClick event.
For more information about using the DocActionEvent object, see Responding to form events.
In the following example, the Source property of the DocActionEvent object is used to display the source XML data of the inner-most XML Document Object Model (DOM) node of the form's underlying XML document, which contains the button: