Override eject?

Is it possible to override the eject (hardware and software) on a CD-ROM?  We are writing a piece of software which cannot have the CD ejected once the software is running.

If the answer is yes, can you please post some code as an example.

Thanks,

Stuart.
LVL 6
Stuart_JohnsonAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ZifNabCommented:
Hi Stuart,

Not long ago I solved a question, for detecting when a new cd is inserted or a cd is ejected. Maybe this can be a solution for you too. When the user pushes an eject button, you can cancel it. I made a component of it. You can find it on Torry's or Delphi Supe r Page. Look for TCDEVENTS. Offcourse I can also e-mail it to you.

http://sunsite.icm.edu.pl/delphi/
http://torry.rimini.com/

I'll look this weekend if I can find something to about disabling this event.

Please, send me some comments about the component.

Regards,
Zif.

0
MatveyCommented:
Hi Stuart! Hi Zif!

I think there is an MCI (maybe API general) command for locking. -I'll search...

Bye for now!
-Matvey
0
d003303Commented:
the ASPI interface provides a mechanism for locking removable devices. But ASPI is only SCSI...no ATAPI
0
Rowby Goren Makes an Impact on Screen and Online

Learn about longtime user Rowby Goren and his great contributions to the site. We explore his method for posing questions that are likely to yield a solution, and take a look at how his career transformed from a Hollywood writer to a website entrepreneur.

ZifNabCommented:
Hi Stuart!

Looked at my component?
Well, it is possible to reject the ejects, but it must be capable with your CD-rom player. Every player I've seen at the moment, don't send that specific message.
What you can do for the moment, is using my component! It's freeware, so that can't be harmfull I supose. If an eject button is pressed, just say that the user needs to reenter the CD.

Regards,
ZiF.
0
Stuart_JohnsonAuthor Commented:
ZifNab,

I had a quick look the other day for your component and couldnt find it.  Any chance of emailing it too me (stuartj@gos.dragon.net.au).  

d330030: Unfortunately I cant just target one type of interface.

Matvey: I've searched the MCI command list and cant find anything in there.  If you do, please let me know!

Thanks guys,

Stuart
0
ZifNabCommented:
Ok Stuart I'll send it to you. Hope it's usefull for you. Soon a new version will be on the net. It's freeware, but ...
I really would like to get an email, for what you use it, what you think about it, improvements ....
PS. The new version has disable/enable autorun (easy to do) and I also implement the events which are fires before an eject (so you can cancel, them). But as I already said, I haven't found a CD-player that really fires this event.
Matvey, Stuart if you want to be notified for a new version, just send me a nice email!.

c.u. Zif.
0
MatveyCommented:
Hi there!

:-( Bad news:
I searched for a lock command in MCI but I didn't find it.
It looks like there is no "DeviceQueryRemove" message for CDROMs also, so you can't cancel it in the usual way.

I hope that Zif's idea works here. Zif, did you try it? what do you do exactly for getting it locked?

If it works then I guess you can make a "locked" property for your component or something...:-)

Well, good luck to you both!
Bye!
0
Stuart_JohnsonAuthor Commented:
ZifNab,

I have looked at that component and think I can use it.  If you want to post me an answer, I'll grade it now.  I'll send you some info via email which will explain what I am doing with it.

The reason I thought this was possible was because I have a Win95 game which turns of the eject.  When you press the eject button on the CD-ROM, Windows actually asks me permission to remove the disk because it is in use.

Anyway, thank both of you for your comments and suggestions.

Stuart Johnson.
0
ZifNabCommented:
Hi Stuart,

                          Not long ago I solved a question, for detecting when a new cd is inserted or a cd is ejected. Maybe this can be a solution for you too. When
                          the user pushes an eject button, you can cancel it. I made a component of it. You can find it on Torry's or Delphi Supe r Page. Look for
                          TCDEVENTS. Offcourse I can also e-mail it to you.

                          http://sunsite.icm.edu.pl/delphi/ 
                          http://torry.rimini.com/ 

                          I'll look this weekend if I can find something to about disabling this event.

                          Please, send me some comments about the component.

Ok for now, but if a program can do it, then we 've to find it out! Don't you think?

                          Regards,
                          Zif.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Stuart_JohnsonAuthor Commented:
ZifNab,

The unit didn't work on my CD-ROM.  It didn't detect the eject/insert at all (I have a new Mitsumi 24x IDE).  I'll try it on the old Creative CR-582 and see if that works.

The points are awarded anyway.  I got what I needed.  Thanks for that!

Stuart.
0
ZifNabCommented:
Strange, that it didn't worked... I've tried it on several and they all fired an event.

But, what have you founded then? Maybe possible to put it in the component?

Zif.
0
Stuart_JohnsonAuthor Commented:
I'll let you know if I discover anything.  The reason for asking for this in the first place was this.  We write education software, all of it running of CD-ROM.  We have found that when students are in a class environment, they tend to do silly things - like eject a CD during the playing of a video.  The teachers have asked if we could do something about it.  However, I found out that it wasnt a priority project and it can wait.  So I'll have a bit of time to find out why your component isn't firing on my drive.

Thanks a million anyway.  Much appreciated.

Stuart.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.