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May 24th, 2016, 10:16 AM
#1
Thread Starter
New Member
how to block a vb applicattion with the internet
hi , i am going to try to explain want i want , if a vb application pass one year after the instalation it`s possible using the internet to block the application?
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May 24th, 2016, 10:23 AM
#2
Re: how to block a vb applicattion with the internet
What do you mean block it using the internet?
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May 24th, 2016, 10:42 AM
#3
Thread Starter
New Member
Re: how to block a vb applicattion with the internet
imagine that you sell one application with a time limite of 1 year , it`s possible to block the application or another way that can`t restrit the use of the program
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May 24th, 2016, 10:53 AM
#4
Re: how to block a vb applicattion with the internet
Your best bet is to find someone who sells software licensing services and use them.
To implement it yourself, you need a fairly complex infrastructure.
First, you need a licensing server. This server's job is to understand who is allowed to use the program.
Second, you need a storefront. This lets people buy licenses, and when they do it updates the licensing server's data so it knows that person is now licensed.
Third, you need licensing code in your program. This code is designed to do several things. It must interact with the licensing server to decide if the program is allowed to run. It must interact with the storefront to allow expired/unlicensed users to buy a license.
Optionally, you might add features to the licensing code to allow a user to validate their license at some point, then work offline for some time. It's a nice feature.
Each of those four facets is something you could build a career on. Each has its own unique security concerns, and each has a lot of pitfalls to fall into. So it's best to pay for a product with a track record, because it will likely take you more time to implement internet-activated annual licenses than it took you to develop your product.
This answer is wrong. You should be using TableAdapter and Dictionaries instead.
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May 25th, 2016, 07:53 AM
#5
Re: how to block a vb applicattion with the internet
How thorough do you want to be?
It's reasonably easy to fudge something together that will store an expiry date e.g. in the registry and then validate against it when the program is run. Of course, a savvy user will simply go into the registry and update the value. If you're selling primarily to non-techy users and can live with the occasional cracker walking straight round your licensing then this is a cost effective way of going about it.
If, on the other hand, you want to shut the door entirely then I agree with Sitten, go for a paid service. Rolling your own will be a huge task and if you succeed you could probably sell it for more than you original software.
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