Hi Doug (aka dlbapm),
Welcome to Laptop GPS World.
You have two options:
* Use Bluetooth,
* or, if you wish to use USB, use Franson GPS Gate. "GpsGate acts as an automatic baudrate converter. The virtual ports used for output simply adapt automatically to what settings the application needs." says the maker of GPS Gate.
GPS Gate has a myriad of GPS-related uses. Check out the web page. It is not free, but there is a free trial. I've personally used your Holux GPSlim 236 via USB + GPS Gate + Streets and Trips. It works :-).