PIP_ADAPTER_INFO pIPAdapter = pIPAdapterRoot;
MIB_IFROW ifRow;
//...
bool connected = ifRow.dwOperStatus == IF_OPER_STATUS_CONNECTED || ifRow.dwOperStatus == IF_OPER_STATUS_OPERATIONAL;

//...
      if (connected)
      {
         printf("%-20s: %s\n", "IP-адрес", pIPAdapter->IpAddressList.IpAddress.String);
         printf("%-20s: %s\n", "Маска подсети", pIPAdapter->IpAddressList.IpMask.String);
         printf("%-20s: %s\n", "Основной шлюз", pIPAdapter->GatewayList.IpAddress.String);
         printf("%-20s: %s\n", "DHCP-сервер", pIPAdapter->DhcpServer.IpAddress.String);
      }