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getting Volume serial number

Posted on 2001-09-04
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Last Modified: 2010-04-06
How do I get the volume serial number from any kind of drive (ex. floppydisk or harddrive)?
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Question by:hutelihut
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9 Comments
 
LVL 3

Expert Comment

by:Slavak
ID: 6453570
Use GetVolumeInformation function
0
 
LVL 5

Accepted Solution

by:
alanwhincup earned 150 total points
ID: 6453623
Here is an example. To use it just stick a DriveComboBox and a Label on a form and put the below code into the DriveComboBox's OnChange event:

procedure TForm1.DriveComboBox1Change(Sender: TObject);
var
  Drive, Name : array[0..255] of Char;
  SerialNum, CompLength, Flags : DWord;
begin
  StrPCopy(Drive, DriveComboBox1.Drive + ':\');
  if (GetVolumeInformation(Drive, Name, 256, @SerialNum, CompLength, Flags, nil, 256)) then
  begin
    Label1.Caption := IntToHex(SerialNum shr 16, 4) + '-' + IntToHex((SerialNum shl 16) shr 16, 4);
  end
  else
    Label1.Caption := 'Error...';
end;

Cheers,

Alan
0
 
LVL 3

Expert Comment

by:VSF
ID: 6458104
NuttyProfessor Graded me with an A on this link for this above answer
http://www.experts-exchange.com/jsp/qShow.jsp?ta=delphi&qid=20170016


Here is complete and easy to use function to get HDD serial number:

function GetVolumeID(DriveChar: Char): String;
var
 MaxFileNameLength, VolFlags, SerNum: DWord;
begin
 if GetVolumeInformation(PChar(DriveChar + ':\'), nil, 0,
    @SerNum, MaxFileNameLength, VolFlags, nil, 0)
 then
 begin
   Result := IntToHex(SerNum,8);
   Insert('-', Result, 5);
 end
 else
  Result := '';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
edit1.text:=GetVolumeID(extractfilepath(application.exename)[1]);    //This will return the drive where

the program is runnig into (Note: it may not be the C drive!)
end;


This should do it!
VSF
www.victory.hpg.com.br 
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Author Comment

by:hutelihut
ID: 6479091
Is'nt it true, that GetVolumeInformation only works on harddrives???
(im not sure..)
0
 

Author Comment

by:hutelihut
ID: 6479095
(ohh bad gramma, I think - hope you will understand)
0
 
LVL 3

Expert Comment

by:VSF
ID: 6479221
No!
It's not true!
I just tested it on my machine using Delphi 5 and Windows 98 and it worked perfectly for my floppy disk!

Take a better look at the code!
Trust me.... it works!
VSF
www.victory.hpg.com.br


function GetVolumeID(DriveChar: Char): String;
var
MaxFileNameLength, VolFlags, SerNum: DWord;
begin
if GetVolumeInformation(PChar(DriveChar + ':\'), nil, 0,
   @SerNum, MaxFileNameLength, VolFlags, nil, 0)
then
begin
  Result := IntToHex(SerNum,8);
  Insert('-', Result, 5);
end
else
 Result := '';
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
button1.caption:=GetVolumeID(edit1.text[1]); //Type A in the edit1 and it will work for sure!
end;
0
 

Author Comment

by:hutelihut
ID: 6482460
Okey, who should now have the points?
0
 
LVL 3

Expert Comment

by:VSF
ID: 6482822
It's up to you to decide which solution fits better!

VSF
www.victory.hpg.com.br
0
 

Author Comment

by:hutelihut
ID: 6489980
Alanwhincup was the first one who mentioned GetVolumeInformation
0

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