VS 2008 - Make A Form That Can Enter A Serial (to Validate The Product)

Jan 28, 2010

I am trying to make a form that you can enter a serial (to validate the product) this is my code :

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim T1 As String = TextBox1.Text
Dim T2 As String = TextBox2.Text
Dim T3 As String = TextBox3.Text


The problem is when i first open my application and i enter my code it goes red, but when i re-enter the code in textbox 1 it works fine, how can i make it work without re-typing?


Make A Program With First Form To Enter The Serial If Correct Just Continue To Form2 If Incorrect Just A Popup Say Like "Serial Incorrect"?

Aug 13, 2010

i just want to make a program with first form to enter the serial if correct just continue to form2 if incorrect just a popup say like "Serial Incorrect" how i can make it ?

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May 17, 2012

im wanting to make my program have to enter a serial and you dont have to enter anymore (Only once) if you want the full version, i have some code here, but i cant seem to get it to work properly, this is the last piece i have to do and its finished.

Private Sub KryptonButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KryptonButton1.Click
If KryptonTextBox1.Text = "" Then


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Apr 17, 2012

I have a form as follows "Price changer" The user is allowed to select a product and enter price . So when the change price button is clicked...the price is stored in a array which is later called

So what i am stuck is when the user selects a product from the drop down menu...the user can enter price . But i need to display a error message when the user enters text instead of numbers for prices. I tried try parse method but it displayed the error message but did not transfer the entered price to the array.

My code is as follows

The bolded intMediaprice() are arrays....

Private Sub btnPrice_Click(sender As System.Object, e As System.EventArgs) Handles btnPrice.Click
If cbMedia.Text = "8-Track" Then


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VS 2008 Validate A Groupbox To Make Sure Radiobutton Is Checked - VB 2008

May 12, 2010

Is there a way to validate a groupbox with a couple radiobuttons in it to make sure that one of the radiobuttons is selected?

Heres why I need this. I need a user to be able to select their class rank out by way of radiobuttons in a groupbox. When they click submit, I need to validate that atleast one of the radiobuttons got selected and if not display a messagebox.

I got one reply early of:

If myGroupBox.Controls.OfType(Of RadioButton).Count(Function(rb) rb.Checked) = 0 Then
'There is no RadioButton checked in myGroupBox.
End If

Is there any other ways other then that? Preferrably a more 'dumbed' down way? This is for just an entry level VB class, I would prefer not to use something of that nature if there is another way.

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Jul 14, 2009

i made a serial key a few time and a simple login form but how do i make it so the serial keys or login info only work for one computer and no one else can use unless they get serial key from me.

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Sep 26, 2009

Dim number = TextBox1.Text
If number < 1 Or number > 100 Then
MessageBox.Show("You must enter a value between 1 and 100", "Name Entry Error", _
MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Exit Sub
End If
Whenever I enter anything other than a numeric value; the form crashes.

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Mar 6, 2009

Note: I'm using VB express 2008 I would mostly like to learn about the console application. Like how to make it type in a command and hit enter by itself. The project I'm working on is a booter for my iPod (Long story) I would like to be able to- 1- Either click a button on a form and have the console pop up and input


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VS 2008 Make Serial Keygenerator?

Apr 21, 2009

I use visual basics 2008 to code, and i made my prject its like a program bot, that uses a regular windows form and textboxes etc.NOw i can make it password protected, and give a user the login info, but in order to make a different login info, i have to change it by going in the project and change the code where its a different login and re-save the new work.

Well i want to make it easy. I want to know the codes like where i can make a serial key generator, and it will generate the keys automatically.And whoever uses the login, info im trying to make it where they only can use it for one pc.

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How To Enter Serial Number Into Registry

Feb 7, 2009

I am trying to release my program now and I have a quick (hopefully quick) question concerning serial numbers. I want to be able to store the trial serial number so if the user uninstalls and reinstalls they won't get another evaluation period free of charge. My concern is that some crafty person will simply move the database files in and out of those installs and keep going indefinately. Although I have some protections built into the database itself in case the program runs out, I just want one extra layer of protection. Is there a way to store the serial number in the registry when entered and check for that entry whenever the program is installed using Windows Installer 3.1?

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VS 2008 Seat All Day By The Computer And Make Serial Keys

Jan 30, 2010

I finished my application and i have a registration system which checks with my server if the key is correct the program is validated and the trial part is removed. So my problem is that i do not want to seat all day by the computer and make serial keys. I want to make a program that will generate the keys for me. I looked into RockXp but that's a third party software.

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Mar 22, 2012

I have an application has a data entry form, and currently I'm using the form validation and validated events to validate the data - along with an error provider. I've read that this logic should be placed in the Dataset rather than the form. To that end, i've started exploring how to do that.


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Aug 11, 2009

Right now i have a form in the VB where there are 2 combobox in it. user can choose from a range of products that comes together with some description  and these are to be stored in a database table.. when i retrieve these data from another form in VB, i'm only able to retrieve the first product and it repeat e same product in my second textbox.

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Jun 25, 2009

I have 2 datagrids. One to show Product information and another for Product purchase details entry. Both share the same dataset.  The dataset (ds) is filled up with columns from 2 table

ProductMstrTbl : ProductID, ProductName..
ProductDetailsTbl: ProductID, PurchaseDate, Amt, BalanceQty..
DataSet(ds) : ProductID, ProductName, PurchaseDate, Amt, BalanceQty.

The problem is that: Showing from dataset or entering new records into the dataset is no problem, but am not able to save the modified dataset into DataBase. SqlCommandBuilder failed to generate the corresponding INSERT, UPDATE command as the dataset has multiple base tables.

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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 26, 2009

Can anyone tell me how to make a serial data base that my application can connect to?

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I want to make live search form like when user enter 1 char then it ll find all data start with or contain letter.i have use the sql like query with textbox textchanged event but it is too slow any other method to make it fast?

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Oct 17, 2009

I am trying to make a product key registrar for my program. I want the product keys in a database or a dictionary type thing where I can make new keys everyday without putting them into the program, and redistrubate them everytime.

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Apr 18, 2011

im trying to make something to protect my application a simple serial key the only thing i can think of is if textbox1.text = ("key") then blah blah blah you get it. what i really want is something that will allow me to add and remove keys without having to mod the application, something that would check a site like

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Mar 30, 2010

How to make when the program loads to give 1 textbox to enter password: if they enter wrong password to give them message that the password is not right and to try again..if the password is right to open the corect form.can someone help me with that i have made 1 keygen program and i have insert there the keygens and to make the program to has more than 1 password inside to check

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Oct 5, 2010

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VS 2008 Make Autotyper Press Enter Every Single Time After The Textbox Message Was Typed?

May 21, 2009

I have Visual Basics 2008 express and I tried to make a autotyper, so this is my

Button1: Timer1.Start
Timer1: Timer2.Start
Timer2: SendKeys.Send(Textbox.text)
Button2: Timer2.Stop

So it was my first try ever with VB and it kind of worked... Only 2 problems;

1. Button 2 doesn't really work, I have to click it really many times, then go to a different window, then click it really many times again, in the meantime it keeps on spamming

2. How do I make my autotyper press enter every single time after the textbox message was typed?

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Nov 3, 2009

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.

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May 16, 2009

I made my program and now I just need to add in the serial and trial part of the application. I know the application must connect to the host and go to a txtfile. How would i do the trial and serial. Also If the serial is already activated I want the application to reject that Serial and Count how many times they entered in a wrong serial.

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2008 Send A Formula Array To Excel That Requires {CNTRL} {SHIFT}{ENTER} Characters To Enter The Spreadsheet?

Aug 23, 2009

I am trying to enter the following on an excel spread sheet from vb.net:applic.activesheet.cells(1,1)="=server|topic!" & Item & My.computer.keyboard.sendkeys("{CNTRL} {SHIFT}{ENTER} ")The error says: "Expression does not produce a value"I tried even {ENTER} and still the same error.

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VS 2008 Serial Data - Make Sure The Correct Data Is Received?

Jun 28, 2009

I am using Visual Basic express to create a serial interface to a multi-room audio controller. I have started by creating a form that can connect to the controller and I can receive data from the Controller and display Zone status, volume etc in corresponding texts box thaks to help from Stanav and Tassa in my previous thread.

My next problem is to do with receiving lots of data from the serial port and my application getting out of sync. This is mainly caused by turning the volum control as each time it is turned a little bit the controller sends out the new status of the Zone being effected

****Turning Volume knob on Zone 1***
Status returned from Controller:


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VS 2008 Product Key Mess X64 And X32?

Jun 8, 2010

Write ive written a product key viewer i Have 64bit i can view my product key if i debug it in 64bit
however if i debug it in 32bit other programs such as office display but my product key wont display then

i need to know how to get them working together or how to make x64 n x86 versions? any ideas

But the only thing is its complied in a webbrowser ive made too soo if i debug it x64 then flash wont play but product key displays and if i debug it in x86 then office will display product key wont display and flash works on the browser?

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Aug 26, 2009

We have a current keygen for a set of our apps that's using des-ede2 in C++.

I need to make my vb.net app validate keys generated by that keygen.

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VS 2008 Protect Product Obfuscation?

May 19, 2009

I've developed a product, I now want to protect it from reverse engineering and decompilation, can anyone share some info about this..?I'm looking for the BEST product out there, for doing this, I want to make it a pain to decompile or reverse engineer my product =)Does anyone know of any? or any other products that do other things that can help protect it, for example, I once found a program which converts ALL your .NET exe, into a C++ exe file, so it's not .NET code anymore, fully machine code or something like that (can't find it anymore though).

I thought posting here would be a good idea, since, a lot of you are very experienced with developing products, and perhaps some of you have used obfuscator's to protect them.

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Dec 18, 2007

Does anyone have code for Extracting Windows XP Product Key Code in VB 2008?

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Nov 11, 2009

My question now is how can i add a screen where the user must enter a product key before he/she can use my program?

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Apr 15, 2012

i try to make a regular expression format to validate phone number at this format: (555) 555-5555 Dim IsPhoneValid As New System.Text.RegularExpressions.Regex("^/([0-9]{3}/)*[0-9]{3}*[0-9]{4}$")

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Apr 26, 2012

I'm trying to figure out a way to validate the user data entered:


This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.

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Jan 28, 2011

I have built a deployment program (vS 2008 Standard Edition) and tried to set the Properties column to a product name and company. I have also tried leaving these blank. I'm really trying to configure my setup.exe so that it installs by default in Program FilesMyFolderName without adding a subdirectory to the path. Is there somewhere I can specify exactly the default path for my setup without it adding a subdirectory? What do I edit?

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Feb 4, 2009

I have a datagridview that's taking a while to load because my table contains almost 5000 records. How can I provide an easy way for clients to filter the grid based on a product name. I was thinking of having labels with each alphabet on my form and when they click a label it filters the bindingsource according to the chosen alphabet. this seems like an awkward solution though.

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Feb 20, 2010

I want my app to need a serial number on the first run before the first form shows.

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Feb 22, 2011

Actually I am trying to get a function to validate all the textboxes in my form. At the moment, my code look like:
Private Sub Textbox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Textbox1.textchanged
If Textbox1.Text.Length = 0 Then
MsgBox("TextBox1 is empty. Please enter something", msgboxstyle.okonly)
End Sub
I have to write the same line of code for each textbox to check if it is not empty and was thinking of using a function that will be called and check each textbox in my form.

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Feb 16, 2011

I have set it up to email me should someone submit this form and an error occur and right now should that occur for most integer or datetime fields if they fail to validate then it will show me which fields in the email failed and what was input into them.

Problem I'm having now is to validate the drop downs and the textboxs in a similar way to what I with integer and datetime fields so I can display those also in the email in case they error.

present integer and datetime validation


Summary:- Need vb code to validate if strings and dropdowns are valid and the use of try/catch block is another possible solution but I wasn't able to figure out how to implement validation for that either.

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Jul 8, 2008

I would like to make an application that will propt the user to enter a serial key in after 10 or 30 days if that is possible also i would allso like to make a keygen tha will work with this program.

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Dec 1, 2010

The form has First Name, Last Name, Course and Email text box fields. First/Last Name must have no spaces, Course must consist of a three letters and two numbers in that order and nothing else(I want to avoid the use of masked text box), and Email must have the "@" sign and a dot. How would one make it so after clicking, say, Submit button and if there was a violation of any of the above rules then message box should pop up and tell the user which fields contain incorrect information.

Private Sub buttonAddNewStudent_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonAddNewStudent.Click
'validation must be performed before the corresponding text box items will be placed inside an array


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