public int QueryInterface(Guid guid, out IntPtr ppv)
        {
            IntPtr r  = default;
            var    rv = LocalInterop.CalliStdCallint(PPV, &guid, &r, (*PPV)[0]);

            ppv = r;
            return(rv);
        }
 public void Release()
 {
     LocalInterop.CalliStdCallvoid(PPV, (*PPV)[2]);
 }
 public void AddRef()
 {
     LocalInterop.CalliStdCallvoid(PPV, (*PPV)[1]);
 }