The Masked Edit control can undo previous user actions (such as entering text). Up to 16 actions can be reversed.
By right-clicking on the edit control, a popup menu is displayed which allows the user to select "Undo".
An application can use the Contents.Undo and Contents.EmptyUndo methods to manipulate the undo actions. The Contents.CanUndo property can be used to test if any actions can be reversed.