Create A License Key Function For Application?
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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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 9, 2010
I am trying to write a protection procedure, which will allow me to create a licence key for our users. This licence key will ensure that the software can only run on the registered system, and will allow the user to access only specific areas of my program which is relevant to them.
I am thinking of using an RSA style approach to this where I want to be the only person who can create the registration keys. But I want to allow the program to be be able to decrypt the key. This is to prevent the average user from being able alter the key and remove any restrictions which are being imposed on the program by the license key.
The process that this would take is to produce a host id which has went through a series of tasks to distort the actual value from the user will return this code us, and from this host id I can then work out the original value of the code. Using these public and private keys I can then encrypt license key information.
However I would like to know how I would implement the private key encryption and key generation program in .NET, so that I can get this setup working in a manner which will allow me to generate keys and allow the program to decrypt keys.
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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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Jul 24, 2011
How can create license for my Class library projects(dlls) or win apps?
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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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Jul 7, 2011
I want to create a global function to use throughout my application. Let say it's about the connection to the database.My code that i plan to use in my global function is:
myConnection = New SqlConnection("...........")
myConnection.Open()
So that I can call it to use in every form throughout my application. This can make me easy to edit the connection later.how to define this global function and how to call this function in the form.
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Aug 28, 2009
I have create a CMS to upload all image to a folder using ed all my images to a folder using,
file.SaveAs(Server.MapPath("../images/") + advertID.ToString + "_" + i.ToString + fileExt)
Now, all images are saved and i forgot it create thumbnails. :(
I need to read all images at once and create thumbnails,
myimg = System.Drawing.Image.FromFile(imgFileName)
myimg = myimg.GetThumbnailImage(154, 94, Nothing, IntPtr.Zero)
myimg.Save(Server.MapPath("../Content/") + "Thumb_" + imgFileName, myimg.RawFormat)
I need this to function fast. I don't seems to know how to read these image names one by one.
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Jul 18, 2011
i made an application for serial communication. for this application i need to set delay time. during this delay time i m doing some other task. So for those task i need to take back control from delay function, for this purpose i am unsing Doevents() function.Its work fine On other OS (XP, Windows7 32/64-bit). But Application.DoEvents() function halt and crash in windows vista.
Private Sub TimeDelay(ByVal DT As Integer)
Dim StartTick As Integer
StartTick = Environment.TickCount()
[Code].....
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Aug 4, 2010
Hello I want to create a windows form application program that can create games something like Gamemaker or Klik & Play (butt less advanced) with D&D "Drag and Drop" events and actions.
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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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Feb 26, 2010
How can I create a VB application in VS2008 without requiring the application be run on a computer with a .NET framework in place?
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May 27, 2009
how to create a uninstall command for a Windows-based application in the Application Folder when creating a new setup project in visual studio 2008.
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Mar 15, 2012
Is it possible to reload a form of the running application from one computer when I executed a function from my other computer with the same application? co'z I want to see the changes of data on my datagrid view?
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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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