Assume this is a COM add-in, then is basically an ActiveX dll.
As such, as long as it is registered, you can call it's public
classes/properties etc as you would any other ActiveX component.

How you do this from .Net is up to you.

NickHK

"kerry" wrote in message
...
Hi, does anyone know how I would wrap an xll file so I can consume it in
an
automated process, i.e. without having excel installed or open? Ideally it
would be a technique that would allow me to call from .net.