我想做个broadcast和读取回应的App，使用TIdUDPClient这个元件
但却连broadcast都送不出去(Wireshark去看网络封包)
请问，问题出在哪里呢？可否指导一下网络的这些元件该怎样使用呢？
感谢！
//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;
}