How do I get hWnd in a .NET service with no UI?

I have a 3rd party library that requires a non zero hWnd parameter as a
parameter to one of it's functions. I need to ue this library in a Windows
Service with no UI. What .NET class should I use to create a simple
invisible window so I can pass it's hWnd to the 3rd party API? In the .NET
Compact Framework, I would use an instance of the the MessageWindow class,
but that class is not available except in the CF version. Do I have to call
the Win32 APIs directly to create a hidden window in a service? Has anyone
already wrapped this functionality and published it? Any suggestions?

Thanks,
Dave