how to create a DLL with non-visual component

I want to create a DLL that uses serial port. I want to use the mscomm11
component from "http://sunsite.icm.edu.pl/archive/delphi/freenew.html".

How can I use a component when there isn't any form ? (the contructor of
this component needs a parent, so it can not work...)
Do you know a site where there is a unit that manages serial port, and
that isn't a component?

thanks
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