procedure TForm .Button Click(Sender: TObject);

var
  VolumeName,
  FileSystemName     : array [0..MAX_PATH- ] of Char;
  VolumeSerialNo     : DWord;
  MaxComponentLength,
  FileSystemFlags    : Integer;
begin
  GetVolumeInformation('C:\',VolumeName,MAX_PATH,@VolumeSerialNo,
                       MaxComponentLength,FileSystemFlags,
                       FileSystemName,MAX_PATH);
  Memo .Lines.Add('VName = '+VolumeName);
  Memo .Lines.Add('SerialNo = $'+IntToHex(VolumeSerialNo,8));
  Memo .Lines.Add('CompLen = '+IntToStr(MaxComponentLength));
  Memo .Lines.Add('Flags = $'+IntToHex(FileSystemFlags,4));
  Memo .Lines.Add('FSName = '+FileSystemName);
end;