Why don't you subclass this control and add it to the form at runtime if it's present on the computer?

>I added an MSCOMM control to form in form designer.
>I need that this control will not be created this control in not present on the user's computer.
>
>Is it sufficient to add
>
>RETURN .F.
>
>to init event of activex control in form to prevent error if this control is not present in user's computer ?
>
>I cannot test it in my computer since it is not possible to unregister mscomm control.
>regrvr32 /u shows success but if I run the form, the control is registered automatically. Why?