public static WFEvent CancelWorkItemEx(string wID, string clientData)
        {
            IWFWorkflowService svc             = Common.GetWorkFlowAPI();
            string             workItemID      = wID;// work item ID
            string             clientDataValue = clientData;
            WFEvent            evt             = null;

            try
            {
                evt = svc.CancelWorkItemEx(workItemID, clientData);
            }
            catch (Exception ex)
            {
            }
            return(evt);
        }