Flags indicating which fields of the GestureManipulationEvent struct are valid for this event.
| None | No values are valid for this event. |
| Time | The time value is valid for this event. |
| DeviceId | The device ID is valid for this event. |
| Translation | The translation of this manipulation is valid for this event. |
| PointerPose | The pointer pose is valid for this event. |