Solved

UuidCreateSequential vs. UuidCreate on WinME

Posted on 2004-04-19
6
1,146 Views
Last Modified: 2007-12-19
I have written a (Delphi) program to extract the MAC address of the ethernet card.

The old (albeit non-standard) way to get this info was extracting it from an UUID created with UuidCreate.

At a certain point, Microsoft realized that putting a MAC address in the UUID was a privacy breach, and changed the UuidCreate function NOT to include the MAC Address. The old function was renamed to UuidCreateSequantial. This means that to get the MAC Address on old OSes you should call UuidCreate, while on newer OSes you should call UuidCreateSequential.

According to msdn, the shift was done with Windows 2000

See:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidcreate.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidcreatesequential.asp

BUT, the fact is that on some WinMe machines I get rubbish results (always changing) calling UUIDCreate

Also, I found this (russian) page where it seems that on WinMe you should call UuidCreateSequential:

http://www.dinform.ru/kuban/htmls/public_htmls/2-5257.html

We get to the question:

Does anyone know if UuidCreateSequential is defined under WinME?

Alternatively, I have written a small Delphi program that allows you to test. You can download it from

www.4004.net/test_mac2.zip (source)
www.4004.net/mac.exe (compiled)

You should run it under WinME (ON A PC WITH A NETWORK CARD!!)  with and without the "Use UuidCreateSequential" option and post here the results. Better if several times, to see if the results are consistent.
If (with the option checked) you get an error "Read of address FFFFFF" this means that UuidCreateSequential is not defined.

thanks
frox
0
Comment
Question by:frox
  • 2
  • 2
6 Comments
 
LVL 17

Expert Comment

by:mokule
ID: 10859408
From
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidcreatesequential.asp

UuidCreateSequential

Requirements

Client: Requires Windows XP or Windows 2000 Professional.
Server: Requires Windows Server 2003 or Windows 2000 Server.

0
 

Author Comment

by:frox
ID: 10859791
Hi Mokule,

Yes, this is the link I provided too.
The fact is that I am not 100% convinced that this is true...
Thanks anyway
frox
0
 
LVL 17

Expert Comment

by:mokule
ID: 10859902
Sorry.
I didn't read carefully.

Unfortunately I can't test it.
0
 

Author Comment

by:frox
ID: 10872934
I have been able to do some tests on winMe myself.

What is stated at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidcreatesequential.asp

is NOT correct: UuidCreateSequential is available under winME
0
 
LVL 5

Accepted Solution

by:
Netminder earned 0 total points
ID: 10875322
User resolved; closed, 250 points refunded.

Netminder
Site Admin
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
Migrating to Microsoft Office 365 is becoming increasingly popular for organizations both large and small. If you have made the leap to Microsoft’s cloud platform, you know that you will need to create a corporate email signature for your Office 365…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now