[DllImport("ole32.dll", SetLastError = true)]
public static extern int OleCreateEx(
ref Guid rclsid,
ref Guid riid,
uint renderopt,
ref FORMATETC pFormatEtc,
uint cAdvise,
uint[] advf,
IAdviseSink[] pAdvSink,
uint[] pdwConnection,
IStorage pStg,
out object ppvObj
);