Share Email Facebook Twitter LinkedIn RevitAPIPreEventArgs.Cancel Method When the event is cancellable, may call the Cancel() method to cancel it. Namespace: Autodesk.Revit.DB.EventsAssembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34) Syntax C# public void Cancel() Remarks Not every event is cancellable. Whether or not an event may be cancelled is indicated by IsCancellable() method. See AlsoReferenceRevitAPIPreEventArgs ClassAutodesk.Revit.DB.Events Namespace