SotM  Спасибки 
 Aion13
    Aion13  3) Вот кнопки для проигрования музыки, тока там их 3-и: play, pause, stop.  
 [more] 
 [Setup]  
 AppName=My Program  
 AppVerName=My Program 1.5  
 AppPublisher=My Company, Inc.  
 DefaultDirName=C:\example    
 [Files]  
 Source: BASS.dll; DestDir: " {tmp} "; Flags: dontcopy noencryption  
 Source: sound.mp3; DestDir: "{tmp}"; Flags: dontcopy noencryption nocompression    
 [Code]  
 const  
 BASS_ACTIVE_STOPPED = 0;  
 BASS_ACTIVE_PLAYING = 1;  
 BASS_ACTIVE_STALLED = 2;  
 BASS_ACTIVE_PAUSED = 3;  
 BASS_SAMPLE_LOOP = 4;    
 var  
 mp3Handle: HWND;  
 mp3Name: string;    
 function BASS_Init(device: Integer; freq, flags: DWORD; win: hwnd; CLSID: Integer): Boolean;  
 external 'BASS_Init@files:BASS.dll stdcall delayload';    
 function BASS_StreamCreateFile(mem: BOOL; f: PChar; offset: DWORD; length: DWORD; flags: DWORD): DWORD;  
 external 'BASS_StreamCreateFile@files:BASS.dll stdcall delayload';    
 function BASS_Start(): Boolean;  
 external 'BASS_Start@files:BASS.dll stdcall delayload';    
 function BASS_ChannelPlay(handle: DWORD; restart: BOOL): Boolean;  
 external 'BASS_ChannelPlay@files:BASS.dll stdcall delayload';    
 function BASS_ChannelIsActive(handle: DWORD): Integer;  
 external 'BASS_ChannelIsActive@files:BASS.dll stdcall delayload';    
 function BASS_ChannelPause(handle: DWORD): Boolean;  
 external 'BASS_ChannelPause@files:BASS.dll stdcall delayload';    
 function BASS_Stop(): Boolean;  
 external 'BASS_Stop@files:BASS.dll stdcall delayload';    
 function BASS_Pause(): Boolean;  
 external 'BASS_Pause@files:BASS.dll stdcall delayload';    
 function BASS_Free(): Boolean;  
 external 'BASS_Free@files:BASS.dll stdcall delayload';    
 function InitializeSetup(): Boolean;  
 begin  
 ExtractTemporaryFile('BASS.dll');  
 ExtractTemporaryFile('sound.mp3');  
 mp3Name := ExpandConstant('{tmp}\sound.mp3');  
 mp3Handle := BASS_StreamCreateFile(FALSE, PChar(mp3Name), 0, 0, BASS_SAMPLE_LOOP);  
 Result := True;  
 end;    
 procedure PlayButtonOnClick(Sender: TObject);  
 begin  
 case BASS_ChannelIsActive(mp3Handle) of  
 BASS_ACTIVE_PAUSED:  
 begin  
 BASS_ChannelPlay(mp3Handle, False);  
 end;  
 BASS_ACTIVE_STOPPED:  
 begin  
 BASS_Init(-1, 44100, 0, 0, 0);  
 mp3Handle := BASS_StreamCreateFile(FALSE, PChar(mp3Name), 0, 0, BASS_SAMPLE_LOOP);  
 BASS_Start();  
 BASS_ChannelPlay(mp3Handle, False);  
 end;  
 end;  
 end;    
 procedure PauseButtonOnClick(Sender: TObject);  
 begin  
 BASS_ChannelPause(mp3Handle);  
 end;    
 procedure StopButtonOnClick(Sender: TObject);  
 begin  
 BASS_Stop();  
 BASS_Free();  
 end;    
 procedure InitializeWizard();  
 var  
 Name1: string;  
 PlayButton, PauseButton, StopButton: TButton;  
 Text: TNewStaticText;  
 Panel1: TPanel;  
 begin  
 WizardForm.Position := poScreenCenter;  
 WizardForm.CancelButton.BringToFront;  
 begin  
 Panel1 := TPanel.Create(WizardForm);  
 with Panel1 do  
 begin  
 Panel1.Parent := WizardForm;  
 Panel1.Left := ScaleX(1);  
 Panel1.Top := ScaleY(315);  
 Panel1.Width := ScaleX(165);  
 Panel1.Height := ScaleY(46);  
 Panel1.TabOrder := 0;  
 Panel1.Color := clWhite;  
 Panel1.BevelInner := bvLowered;  
 Panel1.BevelOuter := bvRaised;  
 Panel1.BorderStyle := bsSingle;    
 PlayButton := TButton.Create(WizardForm);  
 PlayButton.Left := 5;  
 PlayButton.Top := 335;  
 PlayButton.Width := 50;  
 PlayButton.Height := 20;  
 PlayButton.Caption := 'play';  
 PlayButton.OnClick := @PlayButtonOnClick;  
 PlayButton.Parent := WizardForm;  
 PlayButton.Cursor := crHand;    
 PauseButton := TButton.Create(WizardForm);  
 PauseButton.Left := 58;  
 PauseButton.Top := 335;  
 PauseButton.Width := 50;  
 PauseButton.Height := 20;  
 PauseButton.Caption := 'pause';  
 PauseButton.OnClick := @PauseButtonOnClick;  
 PauseButton.Parent := WizardForm;  
 PauseButton.Cursor := crHand;    
 StopButton := TButton.Create(WizardForm);  
 StopButton.Left := 111;  
 StopButton.Top := 335;  
 StopButton.Width := 50;  
 StopButton.Height := 20;  
 StopButton.Caption := 'stop';  
 StopButton.OnClick := @StopButtonOnClick;  
 StopButton.Parent := WizardForm;  
 StopButton.Cursor := crHand;    
 Text := TNewStaticText.Create(WizardForm);  
 Text.Caption := 'music';  
 Text.Parent := WizardForm;  
 Text.Font.Style := Text.Font.Style + [fsUnderline];  
 Text.Font.Color := clNavy;  
 Text.Top := 319;  
 Text.Left := 71;  
 Text.Color := clWhite;  
 end;  
 end;  
 end;    
 procedure DeinitializeSetup();  
 begin  
 BASS_Stop();  
 BASS_Free();  
 end;  
 [/more], это я дал тебе скрипт из  
"Сборника вопросов" с этого сайта, там много всего полезного, почитай.