How do I ensure my assembly is being used by licensed users only?

Question

I recently came across a program that uses a Windows Form Control Library.

To use the DLL, you would add it to references and then to make it run you would do.

Dim DLL As New License
If Not DLL.Check Then End ' VB.net Code

Basically, the DLL would open and if the license that they entered wasn't in the database it would just close.

How would I create a DLL file like this? I have no knowledge on creating a DLL file like this.

Answer 1

You can probably use .NET's component licensing classes.