[程設]BCB如何動態產生一個Indy元件(Ex.IdHTTP, IdTCPClient) 並避免整個程式執行期因get網頁卡住

//Indy元件的確是很好用，可是 IdHTTP的ReadTimeOut事件常不靈驗，導致整個程式因為IdHTTP被卡住(han)
//希望寫一個程式能在想要的時候開啟它，將之加入一個多執行緒中，
//然後用他去get想要的網頁，如此就不會卡住，而影響主程式的程序

//本範例還有引介一個重要的概念－如何去動態產生一個BCB元件，並overwrite他的事件
//依照此範例，你也可以動態產生一個按紐，然後自行定義按鈕的onclick()事件



class TMyThread:public TThread
{
public:
    __fastcall TMyThread(void);
    AnsiString URL,Proxy;
    int Port;
    bool ToGet;
private:
    AnsiString ss;
    TIdHTTP *IdHTTPn;
    void  __fastcall IdHTTPnStatus(TObject *ASender,
      const TIdStatus AStatus, const AnsiString AStatusText);
    void __fastcall Execute(void);
};
_fastcall TMyThread::TMyThread(void):TThread(true)
{
        ToGet = false;
        FreeOnTerminate=true;
        Resume();
}
void __fastcall TMyThread::Execute()
{
        while(!ToGet){;}

        Form_Main->Memo_Message->Lines->Append("Get URL="+URL+" From "+Proxy+":"+IntToStr(Port));
        IdHTTPn = new TIdHTTP(0);
        IdHTTPn->HandleRedirects = true;
        IdHTTPn->ReadTimeout = 20000;
        IdHTTPn->ProxyParams->ProxyServer=Proxy;
        IdHTTPn->ProxyParams->ProxyPort=Port;
        IdHTTPn->OnStatus = IdHTTPnStatus;
        //function point 這是這個程式最重要的部份，運用此觀念可以自行定義元件事件
        try
        {
                ss = IdHTTPn->Get(URL);
        }
        catch(Exception &e)
        {
                Form_Main->Memo_Message->Lines->Append(e.Message);
        }
        if(IdHTTPn->ResponseCode==200) Form_Main->Memo_Message->Lines->Append("Sucess");
        delete IdHTTPn;
        Form_Main->Memo_Message->Lines->Append("================================");
}
void  __fastcall TMyThread::IdHTTPnStatus(TObject *ASender,
      const TIdStatus AStatus, const AnsiString AStatusText)
{
        Form_Main->Memo_Message->Lines->Append("AStatusText="+AStatusText);
}
//---------------------------------------------------------------------------

void __fastcall TForm_Main::ToolButton3Click(TObject *Sender)
{//TThread test
        TMyThread *MyThread=new TMyThread();
        MyThread->URL=("http://dreamyeh.pixnet.net/blog");
        //MyThread->Proxy=("proxy.hinet.net");
        //MyThread->Port=80;
        MyThread->ToGet=true;
}
//---------------------------------------------------------------------------