Determines if mailbox is changed by application.

A Boolean value.  

object.Changed

The Changed Property syntax has these parts:

Changed property is a readonly property that gives you information if, during your mailbox maintenance, have changed contents of any message or not. If Changed = True, this means that you made some action that will result in (maybe only a bit) different mailbox file when you call wodMailbox.Update method.
If Changed = True, this also mean that at least one message in the Messages collection is also changed.

This information is not only for your usage. wodMailbox also uses it for updating mailbox contents if AutoUpdate is set or Update is called manually.

Once you call Update method, Changed property will be set to False.