| Message | Originator (Client/Server) | Purpose |
| Greetings | Either | Establishes a connection. |
| Goodbye | Either | Closes a connection. |
| New Control Panel | Server | Sends control descriptions to client. |
| Control Modified | Either | Modifies a control's value. |
| Ping | Either | Presence check request. |
| Ping Reply | Either | Presence check confirmation. |
| Ack | Either | Acknowledge receipt of message. |
| New Server | Server | Server initializing. |
| Props Update | Server | Modifies a control's properties. |
| Files | Server | Downloads requested files. |
| Profile Request | Client | Requests device-specific layout advice. |
| Profile Reply | Server | Downloads device-specific layout advice. |