[問題] 如何使用BCB XE3的網路元件？

[bluestar8783 (藍星)]

我想做個broadcast和讀取回應的App，使用TIdUDPClient這個元件
但卻連broadcast都送不出去(Wireshark去看網路封包)

請問，問題出在哪裡呢？可否指導一下網路的這些元件該怎樣使用呢？

感謝！

        //IdUDPClient1->Host = BROADCAST_IP;
        //IdUDPClient1->Port = BROADCAST_PORT;
        for(int i=0;i<20;i++) {
                IdUDPClient1->Active = true;
                IdUDPClient1->BroadcastEnabled = true;
                IdUDPClient1->Broadcast(HeadData, BROADCAST_PORT);
                DelayTime(1000, true);
                RecvData = IdUDPClient1->ReceiveString(RECEIVE_TIMEOUT);
                if(RecvData.Length()>0) {
                        redtIPList->Lines->Append(RecvData);
                        break;
                } else {
                        redtMsg->Lines->Append(AnsiString("Re-try count is ")+ (i+1));
                }
                IdUDPClient1->BroadcastEnabled = false;
                IdUDPClient1->Active = false;
        }

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