Get used space of DVD disc

[ndkit]

Currently, I use IMAPI library to get the used space of DVD disc on Win7. The calculation is start when insert DVD (handle by WM_DEVICECHANGE window event). However, with multi session disk (disk that is write many time without finalize), sometime it takes long time to get used space (double when comparing with Window Explorer). I also investigated and found some other ways to get used space (use IOCTL_DISK_GET_DRIVE_GEOMETRY, IOCTL_SCSI_PASS_THROUGH_DIRECT). The calculating time is improved but result is different from Window result. I also wonder there is any way that I can reuse the result of window (window also calculated the used space right after insert DVD) without re-calculating? Or any one else to calculate the used space? Thank you for your interested and helping me.

[Abhinav S]

WMI may come to your aid - check out the Win32_CDROMDrive class[^].

Apps - Color Analyzer | Arctic | XKCD | Sound Meter | Speed Dial

[ndkit]

Can you explain more detail? I search and found the way to get all properties from Win32_CDROMDrive. However, the capacity information of DVD Drive seems not to be retrieved.