PingIP地址

IdIcmpClient1: TIdIcmpClient; 

 IdIcmpClient1.Host:='192.168.0.99';
  IdIcmpClient1.Ping('cccc');

procedure TForm1.IdIcmpClient1Reply(ASender: TComponent;
  const AReplyStatus: TReplyStatus);
var
  sTime:string;
begin
if (AReplyStatus.MsRoundTripTime = 0) then
    sTime := '<1'
else
    sTime := '=';

  Memo1.Lines.add(Format('%d bytes from %s: icmp_seq=%d ttl=%d time%s%d ms',
    [AReplyStatus.BytesReceived,
    AReplyStatus.FromIpAddress,
    AReplyStatus.SequenceId,
    AReplyStatus.TimeToLive,
    sTime,
    AReplyStatus.MsRoundTripTime]));
  case AReplyStatus.ReplyStatusType of
    rsEcho: Memo1.Lines.add('远程服务器良好，可以开始传送。');
    rsError: Memo1.Lines.add('收到错误的回应信息,网络状况有问题。');
    rsTimeOut: Memo1.Lines.add('服务器没有响应，超时了。');
    rsErrorUnreachable:Memo1.Lines.add('错误的地址。') ;
    rsErrorTTLExceeded: Memo1.Lines.add('TTL响应超时，网络状况很不好，建议不要传送。');
    rsErrorPacketTooBig: ;
    rsErrorParameter: ;
    rsErrorDatagramConversion: ;
    rsErrorSecurityFailure: ;
    rsSourceQuench: ;
    rsRedirect: ;
    rsTimeStamp: ;
    rsInfoRequest: ;
    rsAddressMaskRequest: ;
    rsTraceRoute: ;
    rsMobileHostReg: ;
    rsMobileHostRedir: ;
    rsIPv6WhereAreYou: ;
    rsIPv6IAmHere: ;
    rsSKIP: ;
    else
      Memo1.Lines.add('其它未知错误。');
  end;
  Memo1.Lines.Add('');
  Application.ProcessMessages;
end;