Local Printing From Web with WebControl or ActiveX?

I have used the vb.net raw printer helper class from Microsoft to build a
desktop app that prints UPS Labels on a 2844 Thermal.


http://support.microsoft.com/?scid=kb;EN-US;322090



Now, I desperately need to convert this app into something that can print
via the web.  For example, a raw label file is on the server and prints on
the browser's local thermal printer.


I know a web page cannot access the browserââ?¬â?¢s local ports.  However, maybe with a Active X control this is
possible?


UPS has built their own Active X plug-in so I know there is some way.


My question is... Can I do it with .NET?


If anyone has experience with this sort of thing can you please provide me
with some tips? I would appreciate any guidance in this matter. 


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