Register DevExpress libraries

I need to build a single installer for a C# project.

So, I absolutly a newbie with NSIS and, I only need to create a installer in order for me to be able to install an application, by now.

I've took a look on several tutorials provided on NSIS wiki page.
I figure out I need to provide which files to extract in the installation process. However, what about the registration of that ones?

Concretly, I need to register devexpress dlls.
The question, how to register them?

Thanks.

You cannot just assume other people know what DevExpress is.

Maybe you can just copy them to the application directory or maybe you have to call DllRegisterServer.

I assume this DevExpress IDE/SDK whatever it is comes with some kind of documentation that tells you how things need to be registered...