int ExternalPing(String addr){
  String ret;
  String cmdline = String().Cat() << "ping.exe -n 3" << addr;
  Cout() << "Starting Process: " << cmdline << "\n";
  One<SlaveProcess> sp = StartProcess(cmdline);
  while(sp->IsRunning()){
    Sleep(100);
    if(sp->Read(ret)){
        Cout() << ret;
    }
  }
  Cout() << "\n";
  return sp->GetExitCode();
}