InvisibleApp.Redo Method (Visio)
Reverses the most recent undo unit.
expression A variable that represents an InvisibleApp object.
To reverse the effect of the Undo method, use the Redo method. For example, if you clear an item and then use the Undo method to restore it, use the Redo method to clear the item again.
You cannot invoke the Redo method from code that is executing inside the scope of an open undo unit. Code is in the scope of an open undo unit if it is one of the following:
A macro or add-on invoked by the Microsoft Visio user interface.
In an event handler responding to a Visio event other than the VisioIsIdle event.
In a user-created undo scope. If you call the Redo method from code inside the scope of an open undo unit, it will raise an exception.
The Redo method also raises an exception if the Visio instance is presently performing an undo or redo. To determine whether the Visio instance is undoing or redoing use the IsUndoingOrRedoing property.
You can call the Redo method from the VisioIsIdle event handler because the VisioIsIdle event can only fire when the IsUndoingOrRedoing property is False . You can also call the Redo method from code not invoked by the Visio instance, for example, code invoked from the Visual Basic Editor or from an external program.
This Microsoft Visual Basic for Applications (VBA) macro shows how to undo and redo actions.
Public Sub Redo_Example() Dim vsoShape As Visio.Shape 'Draw a rectangle, use Undo to delete it, and 'then use Redo to redraw it. Set vsoShape = ActivePage.DrawRectangle(1, 5, 5, 1) 'Delete the shape. Visio.Application.Undo 'Bring it back. Visio.Application.Redo End Sub