nsresult                    rv = NS_OK;
SendOperationListener::OnStopSending(const char *aMsgID, nsresult aStatus, const PRUnichar *aMsg,                                      nsIFileSpec *returnFileSpec){  nsresult                    rv = NS_OK;  if (NS_SUCCEEDED(aStatus))  {    printf("Send Mail Operation Completed Successfully!\n");  }  else  {    printf("Send Mail Operation FAILED!\n");  }  printf("Exit code = [%d]\n", aStatus);  keepOnRunning = PR_FALSE;  return NS_OK;}