3.2.5.12 Sending an RDPGFX_END_FRAME_PDU message

The structure and fields of the RDPGFX_END_FRAME_PDU message are specified in section 2.2.2.12. The command fields MUST be populated in accordance with this description. The frameId field SHOULD be identical to the frame ID that was transmitted in the most recently transmitted RDPGFX_START_FRAME_PDU (section 2.2.2.11) message. Once the RDPGFX_END_FRAME_PDU message has been sent to the client, the frame ID MUST be added to the Unacknowledged Frames (section 3.2.1.2) ADM element.