Fórum Abrir/fechar a porta do CD - Unidade F #147313

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Article #17740: How can I eject a CD-ROM in code?

Question and Answer Database

FAQ2740D.txt How can I eject a CD-ROM in code?
Category :VCL
Platform :All
Product :All 32 bit

Question:
How can I eject a CD-ROM in code?


Answer:
You can use the Windows API function GetDriveType() to test
if the drive is a CD-ROM drive then use the TMediaPlayer
(even if the CD is not an Audio CD) to eject the CD.

Example:

function IsDriveCD(Drive : char) : longbool;
var
DrivePath : string;
begin
DrivePath := Drive + ´:\´;
result := LongBool(GetDriveType(PChar(DrivePath)) and DRIVE_CDROM);
end;

function EjectCD(Drive : char) : bool;
var
mp : TMediaPlayer;
begin
result := false;
Application.ProcessMessages;
if not IsDriveCD(Drive) then exit;
mp := TMediaPlayer.Create(nil);
mp.Visible := false;
mp.Parent := Application.MainForm;
mp.Shareable := true;
mp.DeviceType := dtCDAudio;
mp.FileName := Drive + ´:´;
mp.Open;
Application.ProcessMessages;
mp.Eject;
Application.ProcessMessages;
mp.Close;
Application.ProcessMessages;
mp.free;
result := true;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
if not EjectCD(´D´) then
ShowMessage(´Not A CD Drive´);
end;


7/16/98 4:31:28 PM

Last Modified: 01-SEP-99

Saudações cara,
faça o seguinte: logo na uses do form declare MMSystem. Eu não sei com o que vc quer abrir o cdrom, eu vou te passar com o evento onclick dos botões:
procedure TForm1.btabrirClick(Sender: TObject);
begin
mcisendstring(´set cdaudio door open wait´,nil,0,handle);
end;

procedure TForm1.btfecharClick(Sender: TObject);
begin
mcisendstring(´set cdaudio door closed wait´,nil,0,handle);
end; :D

Inclua na seção uses: MMSystem

{ Para abrir }
mciSendString(´Set cdaudio door open wait´, nil, 0, handle);

{ Para fechar }
mciSendString(´Set cdaudio door closed wait´, nil, 0, handle);