CD ROM número de série

uses MMSystem, MPlayer;

procedure TForm1.Button1Click(Sender: TObject);
var
mp : TMediaPlayer;
msp : TMCI_INFO_PARMS;
MediaString : array[0..255] of char;
ret : longint;
begin
mp := TMediaPlayer.Create(nil);
mp.Visible := false;
mp.Parent := Application.MainForm;
mp.Shareable := true;
mp.DeviceType := dtCDAudio;
mp.FileName := ´D:´;
mp.Open;
Application.ProcessMessages;
FillChar(MediaString, sizeof(MediaString), #0);
FillChar(msp, sizeof(msp), 0);
msp.lpstrReturn := @MediaString;
msp.dwRetSize := 255;
ret := mciSendCommand(Mp.DeviceId,
MCI_INFO,
MCI_INFO_MEDIA_IDENTITY,
longint(@msp));
if Ret 0 then begin
MciGetErrorString(ret, @MediaString, sizeof(MediaString));
Memo1.Lines.Add(StrPas(MediaString));
end else
Memo1.Lines.Add(StrPas(MediaString));
mp.Close;
Application.ProcessMessages;
mp.free;
end;