property Link.StartUpdateLink as Long
Starts changing properties of the link, so EndUpdateLink method adds programmatically updated properties to undo/redo queue.

TypeDescription
Long A Long expression that specifies the handle to be passed to EndUpdateLink so the updated properties of the bar are added to the Undo/Redo queue of the chart, so they can be used in undo/redo operations.
The StartUpdateLink/EndUpdateLink methods record and add changes of the current link to the control's Undo/Redo queue. You can use the StartBlockUndoRedo / EndBlockUndoRedo methods to group multiple Undo/Redo operations into a single-block. The AllowUndoRedo property specifies whether the control supports undo/redo operations for objects (links, links, ...). No entry is added to the Undo/Redo queue if no property is changed for the current link. Each call of the StartUpdateLink must be succeeded by a EndUpdateLink call. The UndoListAction property lists the Undo actions that can be performed in the chart. The RedoListAction property lists the Redo actions that can be performed in the chart.

The StartUpdateLink/EndUpdateLink methods can record changes for the following properties only:

The Undo/Redo records show as:

within the UndoListAction/RedoListAction result