function Leadtools.Annotations.Automation.AnnAutomation.cancel()
Cancels any operations currently being performed in this AnnAutomation. An operation can be:
(Design user mode) A AnnDrawDesigner is drawing a new object.
(Design user mode) A AnnEditDesigner is editing an existing object.
(Design user mode) The user is selecting a group of objects.
(Run user mode) A AnnRunDesigner is running an object.