I have a COM component that performs logging in a managed MFC application.
The main body of the application is built using /clr, as are all of the MFC
and regular DLL's. The COM componet is not built using /clr.

When I make a call into the COM object from a "normal" C++ class (compiled
with /clr), everything is fine, but when it do it from a "ref" class I get
the following error when I try and call CoCreateInstance inside the COM
object:

The binding handle is invalid.

Does anyone know what might be causing this?

Thanks

Colin