Ouvrir/fermer le lecteur de CD d'après sa lettre

uses MMSystem;

function CdClose( const Value: char): integer;
var
strCommand: string;
strError: array[0..MAX_PATH] of char;
begin
strCommand:= 'open ' + Value + ': type cdaudio alias xxx';
MCISendString(PChar(strCommand), nil, 0, 0);
strCommand:= 'set xxx door closed';
Result:= MCISendString(PChar(strCommand), nil, 0, 0);
strCommand:= 'close xxx';
MCISendString(PChar(strCommand), nil, 0, 0);
if Result <> 0 then
MCIGetErrorString(Result, strError, 255);
MessageDlg(strError, mtError, [mbOK], 0);
end;

function CdOpen( const Value: char): integer;
var
strCommand: string;
strError: array[0..MAX_PATH] of char;
begin
strCommand:= 'open ' + Value + ': type cdaudio alias xxx';
MCISendString(PChar(strCommand), nil, 0, 0);
strCommand:= 'set xxx door open';
Result:= MCISendString(PChar(strCommand), nil, 0, 0);
strCommand:= 'close xxx';
MCISendString(PChar(strCommand), nil, 0, 0);
if Result <> 0 then
MCIGetErrorString(Result, strError, 255);
MessageDlg(strError, mtError, [mbOK], 0);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
CdOpen('f');
end;