This is going to sound awfully stupid ... but I've searched the Delphi help to 
no avail.

How do I do I/O to/from a serial port?  And/or to a USB device?

I understand interrupt handlers, used them in Borland Pascal, so they must be 
present somewhere.  But I can't find them!

Where do I look?  Someone please get me started!

Thanks,
Rainer
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