Smart Trial System Protection
Jun 1, 2010
Just today I've completed a trial version of my application - I then uploaded it to my webserver, and to my surprise a user already (almost one hour after I uploaded it) bypassed the protection and used the software 8 times (instead of the limit of 1 use)!
My "protection" was pretty weak. After the program has been used, it just writes a value to a single registry key. The user just deletes this registry key and can use the program once more, and so if someone does this enough times, he can use the software for as much time as needed.
Anyway, since I'm not really experienced in programming, do you guys have some nice working and possible easy to implement trial protection? I'm not looking for anything too serious, but it shouldn't be as easy to bypass as my current protection.
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Sep 13, 2009
I was in away to develop a system to check any problems installed in a smart card. Such as checking wheter applet fully configure,checking serial no and etc.
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Jul 7, 2009
how can implement smart card and private key stored in smart card by using vb.net
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Mar 19, 2009
how can implement smart card and private key stored in smart card by using vb.net
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Dec 21, 2009
i have to develop a ticketing package for a client...and he wants to use smart cards too...i would need to develop the package on a smart device i.e. a mobile application and will have to read the card on the device itself ...i have zeroed on the instrument from motorola. and an blue tooth connected printer to print the ticket.how to read the smart card ...i have searched a lot but have not found anything good.the smart card would contain the amt. balnce in it...and after the transaction i need to again enter the balance in the smart card...
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Jan 16, 2010
I want to do trial version of software in vb.net. can you tell how to do it
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Jun 26, 2011
I have searched lots of way to make a 30 day trial limit of my program. They say "Use -Settings- in visual basic application for your variables" to save the information about user (like : registered or not registered or when the program expire). (You can see the 'Settings' when you double-click on "my project" in "solution explorer") Does the data which we use with "settings" saved in our program or somewhere in the computer?
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Mar 3, 2010
how can i add a trial with random serials or single serial and once it get registered expire it after 6-12 months....and also if user change its clock time to some day back it remains expire.....
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Jul 28, 2010
i want my software have trial like 30 days or 60 day ... ?
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Sep 25, 2010
I created an application in vb.net using visual studio 2010. I want to create an installation file of the application that will not be free with a license so I want to create a trial of 30 jours.
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Mar 27, 2010
do a project in vb.net.and i want to do demo(TRİAL VERSION).
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim free As Integer = Microsoft.Win32.Registry.CurrentUser.CreateSubKey("demo").GetValue("time", 5) Label1.Text = free& " stay days " hak -= 1 If hak < 0 Then MsgBox("THE END please buy this programm") Me.Close() Else Microsoft.Win32.Registry.CurrentUser.CreateSubKey("demo").SetValue("time", free) End If End Sub
this codes are not daily. i don't want this codes.
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Jun 22, 2010
I need to know how can I make trial(demo) version of my program. Normally people use date & time to do it. But if user will change his system date I guess it will not work. I need to know the best way of making trial version which will work only 7 or 15 or 30 days. Is it possible to make something like that it(program) will kill all files after passing 30 days
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Oct 23, 2011
i develop a project in visual basic 2010 can there is any way to limit this project for trial version
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Jul 27, 2009
How to make a trial versin software in vb.net 2005 for expiration of software after a certain days?
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Oct 21, 2009
Ive created a trial application , but how do i stop that application from running again on the same ip address? Just so the user cant re-install it and use it again.
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Dec 29, 2010
I have seen a similar thread. But it is not answered. The Auto uninstall tool link given in that answer is not working. I want to uninstall .Net Pro Trial and going to install express edition. can anyone please tell me the order of programs to be removed?. Or please give the link for Auto uninstall tool for .Net Pro 2010.
Note: I have some software which are based on .Net Framework. so I should not remove the Framework. Is it possible to install Express Edition without removing this Framework?.
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May 3, 2011
I want to make my program as a trial for 30 days or any number of days (you get the point) ,Kindly suggest me how can i achieve this.
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Mar 29, 2010
Where can I download Visual Basic .net trial version? And is it actually called "Visual Basic .net" or is it "Visual studio 2008" -- ?
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Aug 29, 2010
I have made an application in vb.net of which I want to make a trial version. It should stop working after a week. Is the ClickOnce manifests used for that? Any best approach for this. Preferably a process that does NOT use system date.
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Oct 23, 2011
how can i make a trial period application in visual basic 2010
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Jun 29, 2010
I defined a procedure in splash screen to check application trial time, but now it is still working after deleting the procedure from splash screen form. I am not able to understand why and from where it is working.
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Feb 14, 2011
am using visual studio 2005 professional edition (vb.net) at front end of my project, my project is completed, i have created the simple setup file, but i want to create its trail version too, i mean a full fledge setup, so how do i made it in vb.net?
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Dec 5, 2009
what is the best and secured free way to create a trial software say 15 days or 15 tries?I have research on the net, some required to use registry and some is base on hardware ID but most of the codes is not in VB.NET.
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Feb 26, 2010
I want to make a trial or demo for my program , how i can do that ??
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Oct 18, 2011
How offer a trial version of a application on visual basic ? I looking for something the user can't not uninstall and reinstall the trial and start again the trial period, so when the trial period finish the can not use the application anymore.
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Jul 1, 2008
I am a student developer & working on a project. I am using visual studio 2005 professional. My preferred language is visual basic. I want to know how to make the trial software which expires after some use unless right key is entered and also the procedure for making the registration key enabled software.
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Aug 8, 2011
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If My.Settings.registered = True Then
Form3.Show()
[code]....
This is my code for a trial application. The code is pretty basic but what i couldn't figure out was how i would be able to prevent users from changing the date to extend the trial ("error" i would be getting).
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Nov 23, 2010
i have this .xml file read and display at runtime by vb.net2003. the .xml file is the database which contain various data and its not for adding more data or edited by user so i need to protect the file so that my code can read and display those data. can anyone know how to protect the file.
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Dec 4, 2011
I would like to know if removing the following specials character would be enough to protect my program against SQL Injection :
"'/*$%()!#^&
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Dec 12, 2007
I have created a windows application in VB.Net 2005 using MS Access as backend.Now before delivering its setup to client I have to create its trial version of 30 days and 60 days.How to do this ?Also my setup should be installed only on one computer.I mean my setup copy should be used for one time only.I know how to deploy the project i.e. I can create a simple setup of my project.
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