Instructables
This Is A Simple How to make a Keygen in VB.NET and NO Im not using real Keys. But What You Would Do Is in the coding you would have to replace the X's with The key itself.
 
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Step 4: Coding The Buttons

For the Generate Buttons (Buttons 1/2) Put this code in:
TextBox1.Text = Int(Rnd() * 4)
Select Case TextBox1.Text
Case 0
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
Case 1
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
Case 2
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
Case 3
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
Case 4
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
Case 5
TextBox1.Text = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
End Select
JavedA11 days ago

Hi Sir i have alos millions of software keys with software name so , Is This method are working if we inter a software name in text box1 and press key genrate the key in the text box2

http://www.fullversion1.blogspot.com

CuteEwok'sO26 days ago

I want to make a Keygen Music Keygen, where you hit a button to hear a chiptune.

SeargentA1 month ago

Download my own KeyGen for all games:
http://www.mediafire.com/download/48aobvzh97ob5hh/KeyGen.zip

zack2473 years ago
i would see this as more of a potential use as something for activating a product, sort of like you get a code from the producer, put in this and it gives you the code to get the code for activation, unfortunately as Ether said you would have to do a lot more work to make it a actual "keygen".
error323 years ago
I think you mean that you made a die simulation program that will display some text rather than a number.
Sorry, but this isn't a keygen, it's just displaying some codes you will obtain from other actual keygens released by the crack groups.

To improve it you need to figure out and include the mathemetic formulas used to generate and verify actual unique keys to call it a keygen.

Obviously, that's rather hard to do without reverse engineering the copy protection systems for the specific application.