Title: Open/close CD-ROM
Use mciSendString function.
If you will press button1, then cd-rom will be opened. If you will press button2, then cd-rom will be closed.
procedure TForm1.Button1Click(Sender: TObject);
begin
mciSendString('Set cdaudio door open wait', nil, 0, Handle);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
mciSendString('Set cdaudio door closed wait', nil, 0, Handle);
end;