api call to detect a dll

Hi,

part of my app is only available to certain users who have the neccesary dll
installed and configured on their machine.

Is there an API call to detect if a dll is registered on a particular
machine

thanks

Mark

uh..why don't you just distribute the DLL with your app so the features are available to anyone?

I was just wondering as there are different installations of our product some of which would not use the dll. I can just easily put a reg check in the system as to whether a company can use that part of the program, but I was just womdering whether it could be done

thanks

Mark