how to use a third-party tool licnsed for dot net through vb6?

Question

hi,
I have a dot net application in C#.
I m using a third party tool in the application.
the product is licensed for dot net.
I have the license for the same included in the file license.licx.
The application is working fine.

Now i want to launch the same application from another application which in VB6.

Please let me know how to do it.