Flags
Precision TouchPad standard had 2 specific flags：Confidence and Tip. These two flags can recognize gesture if valid.
The flags are represented as follows:
| Confidence | Tip | Config ID | Action |
|---|---|---|---|
| 0 | 0 | 0x00 | Invalid message, discarded by the system for processing. The previous finger state remains unchanged |
| 1 | 0 | 0x01 | When the finger is lifted, the coordinates are reported and the system will consider the finger to have been lifted, and the gesture is considered complete |
| 0 | 1 | 0x02 | Unreliable contact is typically used in situations such as palm-to-palm contact rather than finger-to-finger contact. The coordinates will be reported but will not be processed |
| 1 | 1 | 0x03 | Valid message, report a normal message. The system will consider that the finger has touched |
- Config ID is defined by HID Descriptor formatting，May differ from the application.
- Some touchpads do not handle the last finger in a two-finger gesture, and thus require a manual action to send a status to the system indicating that the gesture has been completed.
These two flags can be verified through the official verification tool DigiInfo provided by Microsoft。
