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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,mmsystem, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
 sndPlaySound(PChar('C:\online'),SND_ASYNC);
end;

end.                    

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MySong    WAVE    "MySong.wav"                    

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procedure TForm1.Button1Click(Sender: TObject);
var
  ResStream: TResourceStream;
begin

  ResStream := TResourceStream.Create(0, 'MySong', 'WAVE');
  try
    PlaySound(ResStream.Memory, 0, SND_MEMORY or SND_SYNC);
  finally
    ResStream.Free;
  end;

end;                    

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@ECHO OFF
"C:\Programme\Borland\Delphi5\Bin\brcc32.exe" MySong.rc
PAUSE                    

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{$R MySong.res}                    

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Blip wave "Blip.wav"