License Key System For Application
Mar 19, 2012
I have built an excellent licensing key system which works well on desktop pc's. Basically I run an algorythm on the Hard Disk Serial Number and the Customer Name. While this is not totally brilliant, it seems to work really well (on desktop machines or machines with real hard disks). Now that we come to Tablet PC's, I have found that the Serial Number of the "DISK" which is normallyan SSD is the same from one machine to the next - so all unlock codes end up the same. How about making a unique code for each machine I install my application on?
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Apr 24, 2010
I want to create a license key function for my application.
For example I want in this key to contact 2 values: registered_to, expiry_date.
I want the licence key to be some sort of large string like: 2349ASDGKLASD87ASDGALSDK8ASD80972K.
I would need to create some way to create keys use some sort of algorhithm that decrypts the key and grabs the registered_to and expiry_date values. It also needs to check that the key string has some sort of check digit like credit cards have, so no-one can just type in a few random letters/numbers and it accepts.
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Oct 13, 2009
I am using VB.NET for coding and SQL Server 2005 for database.My application is ready for release. Just on thing missing before I can go live.I want to implement license concept in my application.My license file can be text or xml file. In which there should be some encrypted matter which will be used for validate the application.how I can implement this functionality in my application.
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Mar 31, 2011
I'm an old programmer who knows VB6. I want to write an application and distribute it to a friend. I have not enough time to learn now Visual Basic Express 2010. What can I do ? How may I obtain a license for this ?
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Oct 31, 2011
I recently purchased Visual Studio 2010 and am wondering if it is possible to use the VS2010 license as a substitute for VB6 license.
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Jun 24, 2010
I have written a POS application, and now i want to create different versions of it.omething like a basic version, a premium version and a Full version. So if a client pays more they get more features in the same application. Is it possible that i could keep one standard application but features in my application get enabled / disabled depending upon what license key user enters. Restrict parts of code that can be executed only if a certain key was entered.
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Apr 1, 2009
I'm writing an application which has user authentication system, basically, when the user open the software, he has to enter his/hers username and password which are retrieved form a access data base, and if the user is set as admin then it enable some features, I couldn't figure out how to read the column lets say, IsAdmin table, which will store an value of 1 or 0 for example. I need a concept of how build a login system with levels or whatever you guys call it...
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Aug 3, 2009
Event type clr20r3 p3 4a5c12c0 system.net.sockets.socket Exception and Application crash on some system. while running well on others. i go thorugh many forms and search a lot on google but not able to resolve the issue.
[Code]...
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Aug 2, 2011
I have a windows forms application written in VB.NET which scrapes information from serveral web pages (who doesn't right)? Anyway, I am having problem with one particular site where partway through the page navigation my application hangs. When I press pause (or break) in the debugger, it stops on a call to System.Windows.Forms.Application.DoEvents.
Resuming execution shows that it really is stuck on this line (it does not reach the next line of code). It also hangs about the same point each time I run it (at least its consistent). Since System.Windows.Forms.Application.DoEvents yields to other threads on the same processor and then resumes execution of the current thread, I think the problem is that some other thread is not behaving well (not returning from some event handling code). I thought Windows 7 was pre-emptive, which makes me
doubt that theory but I really don't know.
[Code]...
The program scrapes somewhere between 12 and 14 pages before it gets stuck on the call to DoEvents. Does anyone have a clue why this would happen? Why would any call to DoEvents hang?
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Jan 9, 2012
I have recently created an application with Visual Basic.NET. I published my application and installed it. Now the question is that I need to know where exactly does the application gets installed on my system ?
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Dec 12, 2010
Just looking at various ways to do so.I came accross an article which unfortunatly I can't find anymore. It explained it like this. (I'll try remember all of it)1) Put activation key in textbox12) Press button3) Checks with the FTP server if the title of a file (In the this case the license key) in the FTP server.4) If the file doesnt exist then a message box comes up incorrect license.4b) I the file does exist then my.settings.activate = 15) Next time its loaded up, the program checks if my.settings.activate = 15b) If not then an activation key must be put in and proccess starts again.
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Mar 27, 2012
how to get vb6 license nowadays?does the visual studio pro 2010have a downgrade path to vb6?
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Jan 20, 2010
My vb.net browser will be the first application I'm actually pushing out to the public.Everything else so far was for me and friends or some type of class. My problem is I don't know what license to pick to release it under. It's going to be partially open source and partially not.Whats included that i didn't write or make
GeckoFx - web browser plugin like ie but based off firefox
App Life Update - http:www.kineticju...te/Default.aspx ( I have the free limited license)
Sqlite - used for bookmarks
Other than those to plugins/dll files everything else i wrote myself or followed tutorials on and modified to fit my applications need.
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Jun 19, 2009
We plan on selling an application that I've made and we want to be able to force the user to buy a 1-year license for it. And of course after that 1-year we want the program to stop working and force the user to purchase another license.
I've seen many things in VB.NET with certificates/licensing but I'm just not familiar with them to be able to take it any further. And right now I don't have the labor to spend hours messing around with it.
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Jul 27, 2009
I have a problem with my application. I have got it to the point of running the AVG installer, but it fails because a licence key is needed. I have the licence key, but the idea is that my application makes it easy for the user by them just needing to click through.
Is there a way to automatically input the licence key into the licence key field on AVG's set-up from my application? [code]...
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Feb 12, 2009
I have completed a vb.net project and now i need to set 30 day trial period for the software. what are ideas behind generation of license keys. How it is formed. How we can develop our own license keys without third party softwares for creating license keys.
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Sep 14, 2009
I am wondering how to make a product key as a license key for my VB.Net windows form application? Because at the end of the day, i would have to package it as a exe file and i would like to include in a license key for the user.
And also may i know how to package the whole project as a exe file such that after the user excute the installer, everything will run. like how you install windows xp like that.
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Aug 13, 2009
What is the best and most secure way to license software? Is there an existing program for doing so? I want to sell a script of mine, but I want to make sure that users cannot redistribute or sell it themselves (of course, if they deactivate the registration on their own computer and choose to resell, that is their choice).
The software language is VB.net.
Since I am not sure whether or not I could host a registration database of any sort, is there any way to keep licensing self-contained securely? I would like the user to be able to download the demo and be able to upgrade to the full version somehow.
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Aug 28, 2008
I have an application that will be sold to a verticle market. Our techs will do the install, and the software requires hardware for it to work. But I still need to create something so that each customer has a key to use the software. So what is the best way to approach this. I don't high security, because the softare won't do a customer any good without hardware. But it's required in the bids that we do. I also have diffrent options for the software. Not everybody wan't all the bells and whistles, just the basic pakage.I was thinking maybe using a dongel for hardware key? But that more cost.Your thoughts?
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Nov 24, 2009
How can I protect my dll with a license key, I already have my licensing scheme but I don't know where to put it.
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Sep 13, 2010
The issue, is that I'm developing an app that won't be installed and will be used on a bunch of different PCs. The app is free, but uses some 3rd party tools and code, so the user must be aware of the licensing agreement for those tools.
Since it will be used on a bunch of PCs, I don't want the end user to have to accept this license agreement a million times.
Is there any way I accomplish this with a local resource of some sort?I was thinking I could add a license file that should be moved around with the executable, and that could contain a license agreement code, then i could prevent the app from being used without that file.
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Oct 4, 2010
After countless hours of production, I've finally got a working product that I'd like to market. However, I obviously don't want this product stolen and torrented. So, how exactly would I add license support to my program? I'd like to make the license paired with a number that's unique to the compute
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Dec 7, 2010
When a user activates my program, a license file is emailed to them as an attachment. Some people are having trouble saving/downloading email attachments so would it be possible for the program to download the license file during activation into the installation directory?
During activation my program connects to my website and checks the user is registered and if so a license file is created online and emailed to the user[code]...
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Apr 12, 2011
I am trying to complete a driver license exam in vb that includes a module and two forms.It says that I have to have 2 arrays to compare(correct answers and user input) in order to see if the user passed or failed. User must have >15 correct to pass.I am so confused on the arrays part and need help to get this application to work. Can someone please help me with the correct counter accumulator and comparison of the arrays? I am also supposed to declare the correct answers in the module and I have tried everything, but I keep getting errors. [code]
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Mar 28, 2012
I plan to use iTextSharp 4.04.0 for my program for creating pdf on the fly.My find out that iTextSharp 4.04.0 is release under license GNU Lesser General Public License (LGPL).I have searched online but can't really undestand what GNU Lesser General Public License (LGPL) is.My question is does the dll which released under GNU Lesser General Public License (LGPL) is free to use? Free to use by the company?
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Oct 26, 2009
I am creating a built for a vb.net application and i want to include the user license agreement into the built, which allow to click either "Agree" or "Disagree".
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Jul 29, 2002
When trying to edit an exisiting or trying to create a new dialog with a MSFlexGrid I get the following error
The ActiveX control "Microsoft FlexGrid Control, version 6.0" could not be instantiated because it requires a design-time license.
Any one know how to get a "design-time license" for the MSFlexGrid control.
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Jul 20, 2010
Public Function Crypt(ByVal Str As String, ByVal Password As String) As String
Dim SK As Long, K As Long
Rnd(-1)
Randomize(Len(Password))
[code]....
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Sep 13, 2009
suppose i have created new custom control by using visual basic project of type "WindowsControlLibrary" version 2005 the control i have designed consists of a single user control called usercontrol1 however, i would like to protect this control by license file to reduce using of this control to those how have a license only,
thank you1) The failure is first step to success 2) Organizing your time shall organize your life
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Jun 26, 2011
I need to Encrypt my license info and put in the Sqlserver, while user login I need to decrypt the license info and need to check the license. Is there any strong Encryption is available in .net framework 4?
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