property CalcEdit.CanUndo as Boolean
Determines whether the last edit operation can be undone.

TypeDescription
Boolean A boolean expression that indicates whether the last edit operation can be undone.
The control supports multi levels undo/redo support. The CTRL + Z reverses the last editing action, The CTRL + Y restores the previously undone action. Use the CanUndo property to determine by code whether an undo operation is available. Use the CanRedo property  to determine by code whether a redo operation is available. Use the Redo method to redo the next action in the control's redo queue. Use the Undo method to undo the last edit-control operation.