You can use my open source (MPL) library OpenMCDF for a 100% .net implementation of COM structured storage. A sample COM structured storage file viewer is also available as a usage sample of the library.
I'm working on a project that requires me to load an OLE object and render it in a .NET WinForm app (C#). Unlike VB6 .NET has no built in OLE container, and the recommended approach is to use the WebBrowser …