code: func startService() error {
  	// Connect to the windows service manager.
  	serviceManager, err := mgr.Connect()
  	if err != nil {
  		return err
  	}
  	defer serviceManager.Disconnect()
  
  	service, err := serviceManager.OpenService(svcName)
  	if err != nil {
  		return fmt.Errorf("could not access service: %v", err)
  	}
  	defer service.Close()
  
  	err = service.Start(os.Args)
  	if err != nil {
  		return fmt.Errorf("could not start service: %v", err)
  	}
  
  	return nil
  }
docs: // startService attempts to start the btcd service.