>>These functions don't deal with the hardware/firmware. From the Platform SDK: Win32 API:
>>
>>Int 21h Function 440Dh Minor Code 46h (FAT32)
>>Sets the volume label, serial number, and file system for the specified drive.
>
>It doesn't look like there is an easy way to do that. AAMOF, I don't even get a serial number if I try to check the number of a network drive, maybe I am just doing it wrong.

I don't think you're doing anything wrong. If I had to guess, I'd say you're using Win9x. From the Platform SDK again:

lpVolumeSerialNumber
[out] Pointer to a variable that receives the volume serial number. This parameter can be NULL if the serial number is not required.

Windows 95/98: If the queried volume is a network drive, the serial number will not be returned.