enum CellType { kUnknown = 0, kInteger = 1, kDouble = 2, kCharPtr = 3, kPoint = 4, kObjectId = 5, kHardOwnerId = 6, kSoftOwnerId = 7, kHardPtrId = 8, kSoftPtrId = 9, kBool = 10, kVector = 11 };