4 Protocol Examples

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The following list shows the sequence of Device Session Property Access Protocol messages that pass over the wire after the host computer and client device have established a connection.

DSPA Protocol sequence diagram

Figure 3: DSPA Protocol sequence diagram

  1. The host sends the SetStringProperty message.

  2. The client responds with S_OK when the property exists.

  3. The host sends the GetStringProperty message.

  4. The client responds with S_OK when the property exists.

  5. The host sends the SetDWORDProperty message.

  6. The client responds with S_OK when the property exists.

  7. The host sends the GetDWORDProperty message.

  8. The client responds with S_OK when the property exists.