Application Versioning, License Keys, Code Restrictions?
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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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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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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Nov 30, 2011
I have a windows application written in VB.Net 2008, framework 3.5. This app is running on 2 remote desktop servers. I have one user who receives error, This operation has been canceled due to restrictions in effect on this computer. when entering in a text box. When he uses the application on Server 1 he does not receive the error. It only happens to this 1 user on one server.
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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 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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Apr 30, 2012
I've read through all the posts and the Channel9 posts which give answers that range from the standard <Assembly: AssemblyVersion("1.0.*")> version in the AssemblyInfo.vb. This doesn't auto increment at all I set the following
[Code]....
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Jan 5, 2011
I have trouble trying to create versioning of files like words documents. I would like to edit a word document and save it with the same name but I' like to choose between the modified last one with the original unmodified.
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Oct 21, 2008
I have a problem detecting whether one of the arrow keys is pressed, all the other keys seem to be detected apart from the arrow keys??? I have set key preview to True........ It detects the arrrow keys BUT ONLY if I have NO other controls on the form??? example..
Me.Text = e.keycode
It works, but then if I add a button for example, it stops.
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Jun 21, 2010
I have the following code which works pretty fine with Listview. But I would like to use it with computer keyboard up/down arrow keys. How to modify the following code?
CODE:
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Jun 12, 2011
i am migrating vb6 to vb.net.the ini.file of vb6 has to be converted to app.config file, and we has to use this app.config in our code by removing ini file.how to create app.config for this inifile... please any one can respond quickly.
my inifile is like this ..
[Parms]
Language=English
[Enlish]
1=Product Library Copy
[code]....
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Jan 12, 2012
I tried with the following code. It encrypted the file but after I FTP'd the file to my vendor he was not able to decrypt it.Then realized that this code is not using my PGP Keys to encrypt the file. It's creating a new key automatically. That's the reason my vendor is not able to decrypt the file. How can I encrypt the file using my PGP keys? So that my vendor can decrypt the file using same PGP keys.
' Encrypt textfile with Rijndael encryption
Public
Shared
Sub Encrypt(ByVal[code].....
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Sep 8, 2008
is there a way to disable keys on a keyboard?
like the windows key?
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Aug 2, 2009
I would like to know how to send keys to another application and also, how to get some text from application and then send keys.
Example.
somegame.exe ( I type in-game message ?mm ) and my vb.net application see that and send keys to somegame.exe ( Missing Player From Middle Lane )..
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May 7, 2011
What is the best way to manually generate Primary Keys in Entity Framework 4.1 Code First?
I am programming ASP.NET MVC 3 and I use a repository pattern.
I currently generate keys in a sequential order by using the [code]....
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May 4, 2009
I'm trying to make a easy hot key cheat system for a game. I have a timer that checks to see if the game is activated if not then it says game not running in a label box. If so then it says it's running. It detects it running so that's good. I want it to check to see if the numberic key was pressed like 1 and it will type in the cheat code. here's the source.
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Me.Focus()
[Code]......
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Feb 28, 2012
currently my VB Skills aren't so good so bare with me here. application to be able to send keystrokes to another without having it popup. Like it should remain minimized, it shouldn't interfere with whatever you are doing on your PC while it sends the strokes. I received this request from some one else to do. So basically I just need to get focus to the application while it remains minimized and send keystrokes.
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Jun 19, 2010
I'm looking for a basic way to generate keys and have the application verify that it is a correct key.
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Jan 21, 2010
I want to know how to send keys to some application, for example, minimized notepad.I have searched in google, youtube and this forum too.Ppl saying that with Sendkeys.send you can only send keys to application what is in focus of screen. So, can anybody post code here for sending keys to application?
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Apr 25, 2011
I've got a datagridview of 4 columns (bounded to a datasource).I've restricted the first column to only numbers The 2nd column can have input all but numbers The last 2 columns can only have letters. Also for the last 2 columns I programmed that the input is converted to capital letters.
See the following
Private Sub validatekeypress0(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
If Asc(e.KeyChar) <> 13 AndAlso Asc(e.KeyChar) <> 8 AndAlso Not IsNumeric(e.KeyChar) Then
e.Handled = True
[code]....
For the first cell I double click on to edit, the restrictions are fine, but as soon as I click a cell in another column it looks like the restrictions from the previous column(s) are also taken with. At the end, if I double clicked a cell in each of the columns, every column blocks all input.
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Jul 8, 2009
How to make restrictions to a text box, so you can only type and paste only numbers from 0-9 and a "." and nothing else?
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Aug 25, 2009
There was a post with this topic earlier but the solution was not revealed due to security reasons. Is there a way for me to know the solution.
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Oct 8, 2009
how can i prevent the user from entering digits or letters or decimal and how can i convert this code to vb2008 If KeyAscii = 13 ThenCombo2.SetFocusEnd If
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Dec 30, 2010
the thing is i'm a .net programmer at varsity but i cant figure out how to program or insert shortcut/icon keys on the web browser application e.g back,refresh,stop,go. i'm only able to do this using command buttoms. so i want to use simple icons like those on some web browsers.
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Jun 1, 2012
Under RichTextBox_TextChanged event, I have
if RichTextBox.Lines.Count() > 2
{
//Message Box to display the user that you are typing more than 2 lines
}
so what i happens is when i have these data in
[0] - "East coast road"
[1]- "New York"
rich text box, when i click Enter, seems it goes into this state
[0] - "East coast road"
[1]- "New York"
[2] -""
and I get the message pop up box saying can't have more than 2 lines, however the last line is just an empty line? How do i handle the line restrictions in rich text box or how do i ensure that when the user clicks enter I don't move to the next line and move to the next line only if there is 1 line in the rich text box?This returns count as 3 where in there should be only 2, how do i eliminate that white space next line?
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Apr 14, 2009
How do i put restrictions on a text box so that it should not accept spaces ?
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