private static extern int StgOpenStorageOnILockBytes( OleHelper.Interface17 plkbyt, OleHelper.Interface19 pStgPriority, uint grfMode, IntPtr snbEnclude, uint reserved, out OleHelper.Interface19 ppstgOpen);
private static extern int GetHGlobalFromILockBytes( OleHelper.Interface17 pLkbyt, out IntPtr phglobal);
private static extern int CreateILockBytesOnHGlobal( IntPtr hGlobal, bool fDeleteOnRelease, out OleHelper.Interface17 ppLkbyt);
private static extern int StgIsStorageILockBytes(OleHelper.Interface17 plkbyt);