I am having trouble retrieving ITypeInfo with the intention of getting the Type's members w/o using the Interop assemblies.

See attached.

Solved by SW:

            Assembly asm = typeof(SolidWorks.Interop.sldworks.SldWorksClass).Assembly;
            IntPtr ukwn = Marshal.GetIUnknownForObject(comObject);
            foreach (Type t in asm.GetTypes())
            {
                Guid gid = t.GUID;
                if (t.IsInterface & gid != Guid.Empty)
                {
                    IntPtr oPtr = IntPtr.Zero;
                    Marshal.QueryInterface(ukwn, ref gid, out oPtr);
                    if (oPtr != IntPtr.Zero)
                         return t;
                }
            }
            return null;