I have just completed a custom banking & accounting software application for a stingy client who doesnt wants to pay-up! How do i make the application a trail version that will expire in say 30 days, and also ensure that whenever it is installed, it checks for first installation and indicate remaining trial days.
How do programs like antivirus keep track of time passed for the trial period? Eg I want to make a program that expires and stop working in 30 days One way I thought of is to make use of the system time.
I have looked through couple of threads about making the trial application to be expired within certain time. Most of the advice is to set a timer and store it in somewhere in the system with encrytion. Then later decrypt and compare with the date installed in the system.
do a project in vb.net.and i want to do demo(TRÄ°AL 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.
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
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.
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?
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.
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?.
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.
I am writing an application that I want to give to a select number of customers.
What is the best solution to use so that after the trail period (1 month) the application will no longer work.
I was thinking that if they are interested in purchasing the software I will give them a license key or something, to unlock the application. However, I would like to make this unique to every computer.
I am have a very limited budget as I am working on my own. So is there any free 3rd party products that does this?
I was thinking of writing the date the application was installed in the system registry, and each time the application loads it will check if this date is over one month. However, the user could turn back the date on their computer.
Another, solution I was to have the application run some many times. For example, the user can only run 30 times. Then it will lock.
I caused the VB.NET2008 IDE to do something extremely odd and unintentional with some code I was writing. As some of you know, I mostly write programs for industrial equipment. On one of our products, I needed to make certain forms automatically close after a timeout period. To do this, I began programming a usercontrol with a Timer on it (interval = 1000) and a ProgressBar. Timer.Enabled was set to the Enabled event so I could toggle it. When the control counted to it's timeout period, it would call Me.ParentForm.Close
So I build my project, and drop it on a form in the IDE and I see it begins counting! Huh... I had no idea timers were active in the IDE. I wonder what happens when it hit's it's trigger? I figure probably nothing since Me.ParentForm was actually the designer. When it triggered, the whole IDE crashes without save. I tried it twice now. Here's my
Out of curiosity, is there a way i can make a program stop or pause for a period of time (which i would choose) before continuing the code WITHOUT a timer.I think I've seen this done before, but I'm not positive.Also note that I'm talking about a forms application (not a console app if that would be any different.)
If a billing period always starts on say the 22nd of the month and ends on the 21st of the following month then all I'd have to really figure out is how many days are in the month the billing period started right? I hate working with Dates! This is what I've come up with using the idea above...Note, Dates are strings in the first column of a Listview in the format of, mm/dd/yyyy.
' get month from start of billing period (last item in LV) ' example of dates: 06/22/2011 Dim BillStartMonth = CInt(ListView1.Items(ListView1.Items.Count - 1).Text.Substring(0, 2)) ' get Year from start of billing period (last item in LV)
How Do I Make Button.click Event Perform both the enter and period(del) keys on the numeric keypad? [Code] Case Keys.Enter and Case Keys.Separator do not work. Nor does anything like Keys.OEMPeriod for the period(del) key. I've also tried calling the enter key in a KeyPress event etc. But to no avail. Any ideas? I'm trying to mimic Windows calc.exe for a school project and thought I'd try throwing in a few extras such as numeric keypad functionality.
Once again I'm migrating to vb.net finally from vb6 and trying to get some of my old code to work. I was using the following code to let something finish running and then after the time set go to the next.
Sleep just stops the code period but this actually runs the piece before it and then continues. I put it all into vb.net and it threw out an error with DoEvents.
I would like to find out how I can make a complete copy of an existing project.The purpose of this is not for backup but rather to be able to resue some of what I already designed/coded in VB and turn it into a new or different application.
Visual Basic 2010. For a school assignment i had to make a application with XAML in it. I made the tutorial Math Quiz when starting up Visual Basic 2010. This was a Windows Form application that only needed VB programming language. Now i made the Math Quiz and finished it but there is no XAML included or what so ever. Can I still convert this to XAML or just see any XAML language somewhere. Cause I need to proove to my Teacher the application I made includes XAML.
I'm a noobie coming from VBA. i thought i'd try my hand in VB (because this stuff is fun). I'm trying to make the main window for an application. i've created 2 forms so far. one entitled "Main" and the other "Form1". I would like for "Main" to be the main window of the application.
I am trying to make a VB application that can read and write at excel or at SQlite db.With the excel my application works fine, but when i tried to share my application 1 of my friends can open it and all the others no.So i want to try with the SQlite but i dont know what i need for to support the sqlite at my VB project.I am using VB 2010 but i can also i can use C#?
I am trying to make an application which will list all processes in a string when it starts. After it has listed them all I enable my timer, and in the timer there gets checked if the process is in the process list (string), and if it isn't it will add it to my listbox. The only problem is, it's not working, it's never adding an item.
Public Class Form1 Dim AllProcesses As String Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'The first check For Each p In System.Diagnostics.Process.GetProcesses() If AllProcesses = "" Then AllProcesses = p.ProcessName Else AllProcesses += "|" + p.ProcessName End
I was thinking to make an app to save images [or download images] to local hard disk. But to keep it easy, I want this app to create a small picturebox on form to show the thumbnail of downloaded image. Lets say a 5 pictureboxes has to be added with the thumbnails to show the recent downloads. A user can save the location where he wants to save the files on hard disk. A listbox or a dropdown menu will help in categorizing the images, like image1 in friends section, image2 in family section, image3 in others, etc... When the program restarts all the latest 5 thumbnails has to be loaded in pictureboxes and the directory that was chosen. Finally, a button that shows the downloaded images into original image file size one by one or a slide show. Is it possible to make such program?