Tio disable the manual eject of the CD ROM

[rrapheall]

Dear All,
In my application I want disable the manual eject of my CD ROM wha do I do?

Please help

[MikeB]

Dear All,
In my application I want disable the manual eject of my CD ROM wha do I do?

Please help

I don't know how this works, but one thing concerns me. I can imagine that this is done by setting a system variable? If so, if you programmatically change this setting and your application terminates unexpectedly, wouldn't you be essentially locking the CD-ROM drive?

Mike B

[Igor Vartanov]

In my application I want disable the manual eject of my CD ROM wha do I do?

First you read MSDN, I suppose.

IOCTL_STORAGE_EJECTION_CONTROL

[rrapheall]

I tried IOCTL_STORAGE_EJECTION_CONTROL. but in this method I need a handle of the device . In MSDN it is said to use CreateFile, In CreateFile we need to give the volume name as parameter . But How I can find the volume name of the CD ROM.

I was not able to use GetVolumeNameForVolumeMountPoint, some compilation error occured

[golanshahar]

I tried IOCTL_STORAGE_EJECTION_CONTROL. but in this method I need a handle of the device . In MSDN it is said to use CreateFile, In CreateFile we need to give the volume name as parameter . But How I can find the volume name of the CD ROM.

I was not able to use GetVolumeNameForVolumeMountPoint, some compilation error occured

You can use ::GetDriveType() to determine which device is the CDROM. ( simple loop from ‘A’ to ‘Z’ )

Cheers

[Igor Vartanov]

I tried IOCTL_STORAGE_EJECTION_CONTROL. but in this method I need a handle of the device . In MSDN it is said to use CreateFile, In CreateFile we need to give the volume name as parameter . But How I can find the volume name of the CD ROM.

Well, then why do you need drive locking? I thought you wanna lock drive to guarantee some path is available for your program. But in this case you know what path you protect. Can't you extract device name from your path?

[rrapheall]

I tried that . In my system my CD Drive letter is "G" . I gave "G:\" as the parameter to createFile but the call failed and from the GetLasterror I found that my path is wrong.

[golanshahar]

I tried that . In my system my CD Drive letter is "G" . I gave "G:\" as the parameter to createFile but the call failed and from the GetLasterror I found that my path is wrong.

You should be calling ::CreateFile() like that:

  HANDLE hCDRom = ::CreateFile("\\\\.\\G:",0, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);

NOTE: I opened it with FILE_SHARE_READ if you need something else refer to MSDN for the other parameters of ::CreateFile().

Cheers

[Igor Vartanov]

I tried that . In my system my CD Drive letter is "G" . I gave "G:\" as the parameter to createFile but the call failed and from the GetLasterror I found that my path is wrong.

See CreateFile, Physical Disks and Volumes section about volume name rules. I belive, it would be done first before any further asking.

[rrapheall]

Sombody please help me with the full code block, I tried all the way I could but failed . please help

[golanshahar]

Sombody please help me with the full code block, I tried all the way I could but failed . please help

Did you look at my post? there is a sample code that works assuming that your cdrom drive letter is G.

If it still doesn’t help please post the code you are using.

Cheers

[rrapheall]

void CEjectBlockDlg::OnButton1()
{

PREVENT_MEDIA_REMOVAL a;
a.PreventMediaRemoval = true;


OVERLAPPED Overlapped;
m_hFile = ::CreateFile("\\\\.\\G:",0, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (m_hFile != INVALID_HANDLE_VALUE)
{

if( !DeviceIoControl(
(HANDLE) m_hFile,
IOCTL_STORAGE_EJECT_MEDIA,
(LPVOID) &a,
(DWORD) sizeof( a ),NULL,0,NULL,NULL))
{
DWORD a = GetLastError();
CString cs;
cs.Format( "%d" , a );
AfxMessageBox( cs );
}
}
}

[golanshahar]

void CEjectBlockDlg::OnButton1()
{

PREVENT_MEDIA_REMOVAL a;
a.PreventMediaRemoval = true;


OVERLAPPED Overlapped;
m_hFile = ::CreateFile("\\\\.\\G:",0, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (m_hFile != INVALID_HANDLE_VALUE)
{

if( !DeviceIoControl(
(HANDLE) m_hFile,
IOCTL_STORAGE_EJECT_MEDIA,
(LPVOID) &a,
(DWORD) sizeof( a ),NULL,0,NULL,NULL))
{
DWORD a = GetLastError();
CString cs;
cs.Format( "%d" , a );
AfxMessageBox( cs );
}
}
}

And what exactly not working? Did you step in debugger to see whats going on?

Cheers

[rrapheall]

When I debugged I got the error was " Access is denied. "

[golanshahar]

When I debugged I got the error was " Access is denied. "

Something is not clear to me, if you want to disable eject cdrom you need to use the IOCTL_STORAGE_EJECTION_CONTROL like already suggested, and in your sample you using IOCTL_STORAGE_EJECT_MEDIA. If you want to use the IOCTL_STORAGE_EJECT_MEDIA read the documentation in MSDN you should not pass the PREVENT_MEDIA_REMOVAL parameter since it working with IOCTL_STORAGE_EJECTION_CONTROL and not with IOCTL_STORAGE_EJECT_MEDIA so obviously there is a confusion here

Cheers