Dave, Thank you so much for the great advice! I will keep in mind all your words. All the best, Danijel

Actually I have made an Windows Form application and I am trying to protect it by giving a specific activation code generated by some machine id or something like that. I read about many different ways of getting unique hardware serials but there is no perfect solution cause hardware components can be cloned or replaced. I agree with you about activation through server but I would like to make possibility to make also offline registration.

Hi Dave, So what do you suggest to use as the unique identifier?

Hello to all, I am struggling to find a way to get MAC address ONLY from the ethernet card in my PC. It's easy when my PC is not connected on the VPN:

Function getMacAddress()
Dim nics() As NetworkInterface = _
NetworkInterface.GetAllNetworkInterfaces
Return nics(0).GetPhysicalAddress.ToString
End Function

But if it's already connected then the first (0) device is ethernet card of the server that I'm connected and my ethernet is second (1) device so I don't know how to determine. This is showed on the image on this link: https://postimg.org/image/4ndewjjhz/ Any help is very appreciated!

Hi there. I working few years on programing desktop applications through vb.net.Now,I have exigency to start with learning of web development,so I need to know which language is: 1.easiest to learning 2.represented in most popular sites in the world 3.useful I need some reasoned response from you. Thanks in advance.