See GetVolumeInformation API #12653.

>Does anyone know where I can find out detailed information on how volume serial numbers are created and read?
>
>I thought it was basically a somewhat unique ID number created when the disk was formatted or in my case burned. I am finding out it actually changes from OS to OS so the CD I burned has a Volume Serial Number of 5679681780 on my Windows XP machine but the same CD shows the number 4094724434 on my Windows 98 machine.
>
>Any information would be helpful.
>
>Thanks,
>
>Ron