This function returns in the out parameter lastMessageReceiveTime what was the value of the time function when the last message was received at the client.
IOTHUB_CLIENT_RESULT IoTHubDeviceClient_LL_GetLastMessageReceiveTime( IOTHUB_DEVICE_CLIENT_LL_HANDLE iotHubClientHandle, time_t * lastMessageReceiveTime );
iotHubClientHandleThe handle created by a call to the create function.
lastMessageReceiveTimeOut parameter containing the value of time function when the last message was received.
IOTHUB_CLIENT_OK upon success or an error code upon failure.