I'm working on a modular application that handles working with
different file types. Each file type is defined in a separate DLL so
that new types can be defined and then imported. Here's the code I've
been using:

namespace Workspace
{
   public interface class IFileType {
   public:
        virtual String ^GetFileType();
   };

}

This interface is shared among all DLL files. In each DLL there is
supposed to be a definition like:

namespace Workspace
{
   public ref class FileType : public IFileType {
   public:
       virtual String ^GetFileType() { return ".txt"; }
   }

}

This keeps everything structured so the program just has to enumerate
through a list of DLLs looking for DLLs with the class
Workspace.FileType. The program then loads these DLLs dynamically
along the lines of:

IFileType ^ft = reinterpret_cast<IFileType ^>
Activator::CreateInstance(Type::GetType("Workspace.FileType,
TextFile"));

which loads the DLL and initiates an instance of the FileType class.

However, when I attempt to use the class:

ft->GetFileType();

I get a System.EntryPointNotFoundException exception. How do I
properly cast the System::Object ^ back to a copy of my IFileType ^
class?

Evan