Registering a COM object

Hi
I tried to register a COM object (stored in a dll) using InstallLib but for some reason it fails (does nothing) 🙁
When the object is registerd correctly there should be some enties about the "classes" the dll holds and the dll itself should be registerd rigth?
So how can I do this?

try using
!insertmacro UpgradeDLL

Make sure all of the DLL's dependencies are installed and accessible. If they are not installed in one of the DLL search directories, use SetOutPath to set the working directory to the directory in which they're located.