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    <p>Use the <code>TThread.OnTerminate</code> event to know when the thread has finished:</p> <pre><code>type TSendThread = class(TThread) private http : TIdHTTP; Line: string; procedure AddLine; protected procedure Execute; override; public constructor Create; reintroduce; destructor Destroy; override; URL : String; Method : String; property ReturnValue; end; </code></pre> <p></p> <pre><code>constructor TSendThread.Create; begin inherited Create(True); FreeOnTerminate := True; http := TIdHTTP.Create; end; destructor TSendThread.Destroy; begin http.Free; inherited; end; procedure TSendThread.Execute; begin Line := http.Get(URL); Synchronize(AddLine); ReturnValue := 1; end; procedure TSendThread.AddLine; begin Form1.Memo1.Lines.Add(Line); end; </code></pre> <p></p> <pre><code>procedure TForm1.Button1Click(Sender: TObject); var t : TSendThread; begin t := TSendThread.Create; t.URL := 'http://www.url.com/'; t.OnTerminate := ThreadTerminated; t.Start; end; procedure TForm1.ThreadTerminated(Sender: TObject); begin ShowMessage(IntToStr(TSendThread(Sender).ReturnValue)); end; </code></pre> <p>If you want to use a loop to wait for the thread to finish, without blocking the UI, then you can do it like this:</p> <pre><code>constructor TSendThread.Create; begin inherited Create(True); //FreeOnTerminate := True; // &lt;-- remove this http := TIdHTTP.Create; end; </code></pre> <p></p> <pre><code>procedure TForm1.Button1Click(Sender: TObject); var t : TSendThread; h : THandle; begin t := TSendThread.Create; try t.URL := 'http://www.url.com/'; t.Start; h := t.Handle; repeat case MsgWaitForMultipleObjects(1, h, 0, INFINITE, QS_ALLINPUT) of WAIT_OBJECT_0: Break; WAIT_OBJECT_0+1: Application.ProcessMessages; WAIT_FAILED: RaiseLastOSError; else Break; end; until False; ShowMessage(IntToStr(t.ReturnValue)); finally t.Free; end; end; </code></pre>
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    1. USRemy Lebeau
    1. USRemy Lebeau
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    1. COBenjaminWeiss is right. I updated my answer accordingly.
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      1. USRemy Lebeau
    2. COyep thats what i did too :). Thank you so much, been looking for this for 2 days
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      1. USOuerghi Yassine
 

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