Making Apps Is Generating Serial Numbers For Software Projects
Sep 12, 2009
Something ive wondered about as long as ive had an interest in making apps is generating serial numbers for software projects.Im wondering how is this done by the pro's so that someone can put a key into an app and without being connected to the net it knows the key is valid by using an algorythm.Id like to make something like that for the sake of learning how. I realise more and more programs now "call home" at the point of entering a key or to "activate" as with MS office and windows etc, but id like to start at the old school way of doing it.Generating the alpha numeric keys and also checking them.
View 10 Replies
ADVERTISEMENT
Jul 24, 2011
How can create license for my Class library projects(dlls) or win apps?
View 2 Replies
Sep 22, 2011
I have devices with unique serial number (string incremetation) ex : AS1002 and AS1003. I need to figure out an algorithm to produce a unique activation key for each serial number. What would be the best approach for this ?
View 5 Replies
Feb 13, 2010
im making a program that will generate a number ever 1000mil seconds and when it hits 0 its makes a new time and starts again
i have 1000mil seconds set on a timer and i have this code
If Labelcount.Text >= 0 Then
Labelcount.Text = Random.Next(1, waitTextBox.Text)
[code].....
View 11 Replies
Mar 14, 2012
i have a few questions about generating random numbers:1) is it possible for the programme to generate a random number that it has previously generated (i.e could it produce the same number more than once?)2) can you specify what numbers to generate? e.g only whole numbers up to 1000?
View 4 Replies
Feb 6, 2011
I am working on an application, where I have already normalized the databases. Now I am creating an application in asp.net with vb.net as my code behind fine. These random numbers would be stored in the Id column. So, no way there would be repeating the keys. But my application could generate the key, which would probably get repeated. How would I check the database for, so that random numbers wont get repeated? is there any function? Could you give me the code for the same.
View 10 Replies
Nov 24, 2011
How would I go about doing this, is there a for next loop involved and is there a way not using the for next loop ?
View 15 Replies
Jan 4, 2010
Why does it give exactly the same numbers despite different variables? See below code:Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim MyRand1, MyRand2, Myrand3 As New Random
[code].....
View 1 Replies
Feb 20, 2009
is there a code for generating random letters and numbers?? like between 0 to 9 and A to F??
I used this code :
[Code]...
View 5 Replies
Jan 15, 2010
How long it would take to generate all of the numbers between 1 and X randomly.
X=1,000,000 took 6 seconds, and for 10,000,000 took over a minute.
Does that sound reasonable?
Experiment
stopwatch start
count = 0
do while count < x
select a random number between 1 and X inclusive
have i selected this number before?
no-add 1 to count
yes -
loop
stopwatch stop
display elapsed time
I made the Do Loop UI un-friendly and ran this from the IDE using CTRL-F5. My PC is 1.8Ghz and has 2GB of memory. I am using VB 2008, .Net 3.5 SP1.
Looking for work - Zip 65101 [URL]
View 21 Replies
Dec 24, 2011
So I made a program for generating prime numbers in a list box. My initial code had them listed like this:
2
3
5
7
..ect
Now I have them listed in pairs like this :
[Code]...
View 1 Replies
Mar 12, 2012
generating unique ids for invoices,customerids and employee ids, etc. and thought it would be great to share this as i will use it within my aps all the time now.[code]
View 7 Replies
Dec 24, 2009
I am using Visual Basics 2008 Express edition. I want my program that I am making to generate a random amount of numbers and letters in this form when I click Button1.
WM9RX-GG6J2-4WKD9-FDJWM-TYH76
Is this possible?
View 8 Replies
Jun 13, 2011
Basically, what I've done is given the user four tabs to choose from. The main one is the dictionary which I've compiled, and the other three tabs link to online encyclopedias and dictionaries. However, what I want to do is make an app for each of these, because of the fact that the screen space I am giving the user is limited (499px x 254px), and I also believe that it will look more professional.
What I'm thinking of doing is putting the logo towards the top, and then:For Wikipedia, putting the title and picture at the top and breaking the article into show/hide sections like the mobile version
For Wiktionary, putting the title at the top, and breaking it down into show/hide sections when applicable
For Dictionary.com. putting the title at the top and showing the definitions (with linked pronunciations) underneath
Of course, I'll need it to automatically redirect itself to the webpage I need it to go to, because I don't want to type another 300,000 lines of code just to go to a website.
View 2 Replies
Feb 16, 2011
Possible Duplicate: x86/x64 CPUID in C# I need to retrieve CPU's serial numbers. When using WMI, it is called CPUID.My goal is to access that information WITHOUT using WMI. Unmanaged is code is fine?
View 2 Replies
Jun 13, 2010
I just found this amazing DLL that can extract the hardware ID (computer RAM, hard drive unique serial number, partition serial number, CPU unique serial number, etc) of a computer.
However, there is no documentation for VB users and it is written in Pascal and assembly language. Ya, sad
connect to this DLL?The documentation says that the DLL exports the following functions:
[Code]...
View 9 Replies
Apr 29, 2011
I have recently built a personal project but I forgott to finish some menu items and the application is only half done, as you can imagine from a developers point of view this is quite disapointing.
I could have rectified this if I new how to build applications that could be updated whenever I make changes.
My question is this:- can anyone please give me a basic run down on how to make my applications able to accept updates when changes are made ALSO how do I build applications with a 30 day lisence FINALLY can I write my own serial numbers or does Visual Studio create them automatically.
View 7 Replies
Feb 12, 2011
I wrote this sub routine that is running, but it only returns the local Computer name and Serial number. Any one know the why to grab the Computer name and serial by IP address? I am using VB 2010.
[Code]...
View 2 Replies
Mar 12, 2011
I want to generate serial nos while i insert records in sql database like 1,2,3,4,5,6[code]...
View 5 Replies
Mar 10, 2010
I'm using 2008 Express and I'm trying to send 1 byte of data on the serial port.
Serialport1.write(123) Sends 3 bytes with the ascii codes representing 1 2 and 3.
I want to send 1 byte that contains 123.
View 2 Replies
Jun 24, 2010
Searched High & Low to find a reliable way to get HDD real serial numbers in VB.NET. WMI method using Win32_PhysicalMedia, does not work reliably (I am administrator & using XP Pro & SATA drives)
View 4 Replies
Nov 10, 2009
I am making a application that you enter 3 number one for length, width, and height of a rectangle.It needs to display a picture showing all three.i am using windows form application to do this wil three text boxes to enter the numbers.
View 3 Replies
Nov 21, 2010
I made a form with a two text boxes for user input.A (lower bound) and an (upper bound), and then a text box to display all prime numbers in that range.I can't figure out what I am doing wrong, my error checking works properly but my math onlyreturns a true or false.
Function
Prime(ByVal findPrime
As Int32)
[code].....
View 1 Replies
Mar 9, 2012
how to make the values in a text box accepts only letters in the text box for data that are for letters only and numbers for data requiring numbers only
View 7 Replies
Dec 18, 2011
[code]How i can make The Program to find Numbers On Form and Do That without making So Many "Same" Codes?Its Pretty Annoying To Make Big Program nad only Copying and Pasting Text.
View 3 Replies
Feb 3, 2012
I have an assignment that includes some extra credit point by making a calculate button take four numbers, add them together and give a commission. I know what I did works, but I just want to make sure I'm doing it right! Let me know if I did something wrong
[code]Private Sub calculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculateButton.Click
[Code]...
View 7 Replies
Mar 15, 2009
Removing projects from VB2008 start page recent projects list. The above list is getting clogged. How do I remove items from this list?
View 3 Replies
Jun 21, 2010
what WPF based apps are?Is it an application that runs under Silverlight? If so, how?I know; Windows Forms based apps,console apps,DLL _ Class Library Projectsand I've had an introduction to ASP.Net.What I mostly want to know is, if WPF apps are for Silverlight then do they also run in a server based fashion like anASP.NET website would when you create ASP.Net webpages?Is it a way of creating what looks like a FORMS BASED application but it runs in a browser instead or what?Please enlighten me a bit further as I have no idea what WPF is all about.
View 3 Replies
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.
View 2 Replies
Mar 28, 2006
I have a stand alone VB.Net 2005 application that uses a serial port that generally stays open while the application runs on a Windows XP system. In trying to bullet-proof the UI, I ran into a problem when the USB to Serial Converter normally used to provide the serial port is disconnected while the serial port is open. In trying to handle the resulting error when accessing the port, I find I cannot close the port.
When trying to do so, the error message says something like "unable to close the port. You may not have sufficient permissions." Reconnecting the USB/Serial Converter does not reactivate the port.
[Code]...
View 8 Replies
