comport driver, USB converter errors

[sggaunt]

I use TCommport library for serial comms, all have been well until the advent of USB, what can happen with the driver is that if the USB connection is lost, the driver cannot cleanly close the Virtual Port.

The user sees an error message 'Purge comm function failed'

This isn't good, and usually the only way to get things going again is by restarting the application.

I have been following a forum on the sourceforges pages for the driver.

http://sourceforge.net/projects/comport/forums/forum/261327/topic/3429827

this is all fine except that the final code solution posted seems to me to close the port OK but leaves the exception unhandled, so the user will still see the 'purge comm failed message', I would like to replace this with something more meaningful.
Would this work?

 type
  EAbortErrror = class(Exception);

//--------------------------
try
    try
       AbortAllAsync;
    except
       raise EAbortError.Create('USB Connection Lost,    don''t panic');
     end
finally
   // stop monitoring for events  
   if FThreadCreated then
      begin
         etc...
      end
   // and close the port
end

Steve: N.M.N.F.
If something is popular, it must be wrong: Mark Twain