how to determine free space on a specific CD drive ?   

I know the drive letter of the CD drive, and am trying to figure out how 
much free space is on the CD in that drive.  How can I do this?

For example, I know the drive is D:.  I know I can use the IDiscMaster 
interface to enumerate through all of the individual recorders, and then use 
IDiscRecorder::QueryMediaInfo to get the free space on the disk in each 
recorder, but how do I know which recorder goes with my D: drive?

Thanks,
Mark
--
Beiley Software
http://www.beiley.com

date: Tue, 21 Aug 2007 20:14:32 -0700   author:   Mark Beiley nowhere AT donotuse.com

Re: how to determine free space on a specific CD drive ?   

I found a solution to my own question, so am posting the answer here...

You can use CreateFile() on the drive letter, and then use that handle in 
DeviceIoControl() with IOCTL_SCSI_PASS_THROUGH, to get the 
vendor/product/revision of the physical drive for this drive letter.  Now 
use IDiscMaster to enumerate through all of the IDiscRecorder's, comparing 
the vendor/product/revision, until you find a match.  Once you have the 
right IDiscRecorder, you can use QueryMediaInfo to find the free space.

Thanks,
Mark
--
Beiley Software
http://www.beiley.com



"Mark Beiley" <nowhere AT donotuse.com> wrote in message 
news:exaRRqG5HHA.2108@TK2MSFTNGP02.phx.gbl...
>I know the drive letter of the CD drive, and am trying to figure out how 
>much free space is on the CD in that drive.  How can I do this?
>
> For example, I know the drive is D:.  I know I can use the IDiscMaster 
> interface to enumerate through all of the individual recorders, and then 
> use IDiscRecorder::QueryMediaInfo to get the free space on the disk in 
> each recorder, but how do I know which recorder goes with my D: drive?
>
> Thanks,
> Mark
> --
> Beiley Software
> http://www.beiley.com
>

date: Thu, 23 Aug 2007 08:59:11 -0700   author:   Mark Beiley nowhere AT donotuse.com