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Finger Print Class

, 8 Jul 2007
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Get a unique Finger Print / Machine ID which can be used for licensing purposes.

Screenshot - FingerPrint.gif

Introduction

For my current project, I was looking for some way to generate a unique machine ID from the running computer's hardware so that I could use it for license purposes.

I looked everywhere, but I couldn't find any information as to how to do that. I did find a couple of third party controls that looked OK. One of them was TheScarms AppSentinel component (http://www.thescarms.com/AppSentinel/default.aspx), but unfortunately, that was written in VB6, and required distributing the VB6 runtime files. I didn't want to do that. The other was Ionworx' Machine ID component (http://www.ionworx.com/machineid.html). That looked OK, so I purchased the control. But, due to a lot of complications, I didn't get the license key from Ionworx until two weeks later.

Now, what does a person do in the meantime? I continued looking around the net, but with little luck. Until I happened to stumble over a page in another forum. A guy named Brian Hawley had done an absolutely brilliant piece of code. It was precisely what I was looking for - and simply too good to pass up.

I cannot take credit for the idea itself - all credit goes to Brian. But, I did convert the code from C#.NET to VB.NET (2005 - Framework 2.0), and I added some extra functionality. I hope Brian doesn't mind, because the code is simply too good not to share with others.

What the code does is that it gets the ID from the computer's CPU, BIOS, hard disk, motherboard, video card, and network adapter. It mixes it all together and generates an ID.

I added the possibility of selecting exactly what parts should be included in the test. You can use all, but I strongly recommend skipping the CPU ID, because it takes a really long time.

I also added the possibility of selecting the number of characters the result should consist of. More than 8 is really not necessary, because the number normally doesn't get any longer than that, but you might want to write your own routine to utilize the data and generate the machine ID from some other algorithm.

Background

If you're interested, the original C# code is here (6.64 KB), and a C# demo program can be found here (18.2 KB).

The direct translation to VB.NET done by me can be found here (13.7 KB). It is identical to the C# code above.

And of course, the enhanced code and VB demo programs can be downloaded from the links at the top.

Using the code

You simply need to instantiate the class and set the required properties. Then, you query the Value property - et voila!

Private fp As JCS.FingerPrint = New JCS.FingerPrint

fp.UseCpuID = False
fp.UseBiosID = True
fp.UseBaseID = True
fp.UseDiskID = True
fp.UseVideoID = True
fp.UseMacID = True

fp.ReturnLength = 8

MsgBox("Finger Print is: " & fp.Value)

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Johnny J.
Software Developer (Senior)
Sweden Sweden
Born in Copenhagen, Denmark
Have been living in Paris, France and L.A., The United States
Now live in Stockholm, Sweden
 
Started programming when I got my first VIC 20, and a few months later on Commodore 64. Those were the days!
 
Studied programming at the Copenhagen Engineering Academy
 
Professional console, winforms and webforms programming in Comal, x86 Assembler, Fortran, Pascal, Delphi, Visual Basic 3 through 6, Classic ASP, C# and VB.NET
 
I now work as Senior .NET developer building Airline Booking Systems, and have a number of projects in various states of progress to work on in the spare time...
 
PS: The cat on my profile is one of my three cats, Ramses. He's all white, odd-eyed, deaf and definitely the coolest cat there is!

Comments and Discussions

 
GeneralRe: cann't download [modified] PinmemberEng_MR5-Jan-08 0:25 
QuestionHow can i make your demo work? PinmemberUmega13-Nov-07 21:32 
AnswerRe: How can i make your demo work? PinmemberJohnny J.13-Nov-07 21:54 
GeneralRe: How can i make your demo work? PinmemberUmega14-Nov-07 13:53 
GeneralThanks. Pinmemberbrian.hawley28-Jun-07 3:35 
GeneralRe: Thanks. PinmemberJohnny J.28-Jun-07 3:54 
GeneralRe: Thanks. Pinmemberbrian.hawley28-Jun-07 3:59 
GeneralVB6 Fingerprint PinmemberEdwardX216-Jun-07 4:50 
GeneralRe: VB6 Fingerprint PinmemberJohnny J.16-Jun-07 13:04 
GeneralRe: VB6 Fingerprint Pinmemberpikoon14-Mar-08 22:40 
GeneralRe: VB6 Fingerprint PinmemberEdwardX217-Jun-07 13:03 
GeneralRe: VB6 Fingerprint PinmemberJohnny J.26-Jun-07 21:39 
GeneralRe: VB6 Fingerprint PinmemberIonworx7-Jul-07 13:53 
GeneralRe: VB6 Fingerprint PinmemberJohnny J.8-Jul-07 21:03 
GeneralBad idea to base only on WMI PinmemberTonyTop20-May-07 10:32 
GeneralRe: Bad idea to base only on WMI Pinmemberbrian.hawley28-Jun-07 3:57 

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