3.11 Chat (Text) Sender Details

After the Remote Assistance connection is established, the application SHOULD open the virtual channel 70 to send and receive chat messages. Because there are only two computers involved in the connection, it is assumed that any data received on the chat virtual channel 70 is a Unicode string to be shown to the user as a message from the other person they are connected to. There is no header information, and each block of data received on the channel is conceptually thought of as a distinct message from the other user. To send a chat message, the message formatted as a NULL-terminated Unicode string can be sent on virtual channel 70.