No. You would only have to register it on the machines that will be using the control.

>Hi!
>
>The question preview is because I have a class library (vcx) and my program is shipping some customers but only one have the new feature and I don't want create a new library.
>The fact to compile the class library, with the class with the OCX, compels me to have the OCX registered in all the customers same whom this class does not use?
>
>Bye!