I'm trying to use the IGroupPolicyObject interface
suggested by Mattias S. :
http://www.dotnet247.com/247reference/msgs/39/197771.aspx

I'm wrapping this interface in another class sort of like this:

namespace MyNamespace
{
      class WrappedIGroupPolicyObjectClass
       {
              IGroupPolicyObject wrappedIGPO;
              ...

               //Constructor
               public WrappedIGroupPolicyObjectClass()
               {
                   //Tried both of these
                   t = Type.GetTypeFromCLSID(new
Guid("EA502723-A23D-11d1-A7D3-0000F87571E3"));
                   t = typeof(MyNamespace.IGroupPolicyObject);

                   wrappedIGPO = (IGroupPolicyObject)
Activator.CreateInstance(t);//Blows up here
                   ...
               }

               ...

               ...
       }

       [ComImport, Guid("EA502723-A23D-11d1-A7D3-0000F87571E3"),
       InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
       interface IGroupPolicyObject
       {
           ...
           all of Mattias's declarations here
       }
}

Note that I have the interface declaration in the same file and resulting
dll.

As I wrote
wrappedIGPO = (IGroupPolicyObject) Activator.CreateInstance(t);
fails. CreateInstance does not like to create an instance when t is refering
to an interface.

I saw this:
http://www.yoda.arachsys.com/csharp/plugin.html
which looks similar to my situation. He suggests to put the interface
declaration
in a separate dll. I'll try that as soon as possible.
Any other suggestions??

TIA
Lars