how to eject and close the cdrom

I want to know without tmediaplayer how can i eject and close the cdrom? and if i have two cdrom driver how can i know what cdrom i will eject?
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chengjianAsked:
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bruintjeCommented:
Happy new year everyone.

And thanks Barry.

bruintje :O)
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intheCommented:
hi'
put mmsystem in your uses clause then to open do:
mcisendstring('set cdaudio door open wait',nil,0,handle);

and to close do:
mcisendstring('set cdaudio door closed wait',nil,0,handle);

see more info in mm.hlp under find open / opening simple devices

Regards barry


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BlackDeathCommented:
hi, inthe.

problem is still to determine which cd-rom to operate in a multiple-cd-rom machine...

Black Death.
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chengjianAuthor Commented:
Thanks a lot.
But BlackDeath has told you what the problem is!
Thanks BlackDeath.
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intheCommented:
sorry all i can only do this with tmedia player but i would just make it invisible anyway .
you will have to do something with winapi GETLOGICALDRIVES
it will return device types and the one your after is dtCDAudio
 
  (reject my answer next time i'll read ALL of the question:-)
Barry

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bruintjeCommented:
Hi Chengjian,

Well combine this from the Borland TI with the answer from Inthe, when I saw this Q first didn't have the time to find out how to close the CDROM. So now you can specifically make a call to a CDROM in drive A to Z

 
 
 
 
Frequently Asked Questions

How can I eject a CD-ROM in code?


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;

Hope this helps
:O)
Bruintje.

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chengjianAuthor Commented:
Your program works good but i do not want tmediaplayer
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bruintjeCommented:
Hmm got to the read question better next time.
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chengjianAuthor Commented:
I can Barely accept the answer for the only points
How can i give both inthe and bruintje points?
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intheCommented:
dont worry bout the points mate reject my answer and bruintje
can leave a message as an answer as his way is only way i know how to do what your after.
regards barry
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chengjianAuthor Commented:
inthe: Thanks for your answer. i am sorry.
bruintje: Put it as answer

Thanks all

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