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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.
Figure 3: DSPA Protocol sequence diagram
The host sends the SetStringProperty message.
The client responds with S_OK when the property exists.
The host sends the GetStringProperty message.
The client responds with S_OK when the property exists.
The host sends the SetDWORDProperty message.
The client responds with S_OK when the property exists.
The host sends the GetDWORDProperty message.
The client responds with S_OK when the property exists.