3.2.5.3 Sending an RDPGFX_DELETE_ENCODING_CONTEXT_PDU message
The structure and fields of the RDPGFX_DELETE_ENCODING_CONTEXT_PDU message are specified in section 2.2.2.3. The command fields MUST be populated in accordance with this description. Both the codec context specified in the codecContextId and the surface identified in the surfaceId field MUST exist on the client.