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Delphi(Pascal) code:

procedure TForm1.Button1Click(Sender: TObject);
begin
Windows.Beep(440, 1000); {×¢Òâ: Èç¹ûûÓÐ Windows ǰ׺, µ÷ÓõÄÊÇÁíÒ»¸öº¯Êý}
end;


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