C# Signature:

[DllImport("ole32.dll")]
static extern int OleCreateLinkToFileEx([MarshalAs(UnmanagedType.LPWStr)]
   string lpszFileName, [In] ref Guid riid, uint dwFlags, uint renderopt,
   uint cFormats, uint rgAdvf, FORMATETC [] rgFormatEtc, IAdviseSink
   pAdviseSink, [Out] uint [] rgdwConnection, IOleClientSite pClientSite,
   IStorage pStg, [MarshalAs(UnmanagedType.IUnknown)] out object ppvObj);