C# Signature:

[DllImport("ole32.dll")]
static extern int OleCreateLinkFromData(IDataObject pSrcDataObj, [In] ref Guid
   riid, uint renderopt, [In] ref FORMATETC pFormatEtc, IOleClientSite
   pClientSite, IStorage pStg, [MarshalAs(UnmanagedType.IUnknown)] out object
   ppvObj);