송신방법
//          IdUDPClient1->SendBuffer(SendData,12);  // ok  클라이언트

수신방법
void __fastcall TForm1::IdUDPServer1UDPRead(TObject *Sender,
      TStream *AData, TIdSocketHandle *ABinding)
{
  // udp 통신 수신시 처리 방법
   AnsiString str1;
   String str;
   char *dda;
   char ddb[5];
   TStringStream* pss = new TStringStream(str1);
   pss->CopyFrom(AData, AData->Size);
   pss->Seek(0, soFromBeginning);
   str1 =pss->DataString;
   delete pss;