SPWorkItemCollection
public static bool DoesUserHaveWorkItems(int userId, SPContentDatabase contentDb, Guid[] workItemTypes)
public bool RevertInProgressWorkItems(Guid processingMachineId, Guid parentId, Guid typeId, Guid batchId, bool bRevertAll)
public void UpdateWorkItem(Guid workItemId, DateTime deliveryDate, byte[] binaryPayload, string textPayload)