public HRESULT GetAllocatedBlob(Guid guidKey, out IntPtr ppBuf, out uint pcbSize)
{
var hr = _type.GetAllocatedBlob(guidKey, out ppBuf, out pcbSize);
Trace("guid: " + guidKey.ToName() + " pv: " + ppBuf + " size: " + pcbSize + " hr: " + hr);
return(hr);
}