>I´m trying to read the serialnumber from VFP5 but I have come to a stalemate. I´ve tried using the Sys(), the GetVolumeInfo, but unsucessfuly... can someone throw me a line on this?, thanks

Could you perhaps post the code and the results you're getting from GetVolumeInformation()? One more thing, is this a network drive? As a side note, you can also retrieve a drive's serial number via the Windows Script Host, like this:

oFSO = CREATEOBJECT('Scripting.FileSystemObject')
oDrive = oFSO.GetDrive("C:")
? oDrive.SerialNumber

Of course, the WSH needs to be installed.