3.2.5.4 Sending an RDPINPUT_SUSPEND_INPUT_PDU message
The structure and fields of the RDPINPUT_SUSPEND_INPUT_PDU message are specified in section 2.2.3.4.
To request that the client resume the transmission of input messages, the server MUST send the RDPINPUT_RESUME_INPUT_PDU (section 2.2.3.5) message to the client, as specified in section 3.2.5.5.