Mock of COM objects

Hi

We are creating a dynamic mock to a COM object by mocking the interop assembly. However when we mock the constructor, the COM object is still called. We know this as we get a message from the actual COM object. Is mocking COM objects supported?

Example code:
MockManager.Init();

MockObject dynaMock = MockManager.MockObject(typeof(InteropAssembly));

InteropAssembly interop = dynaMock.Object as InteropAssembly;
TestClass x = new TestClass(interop);

MockManager.Verify();