public HRESULT GetAllocatedString(Guid guidKey, IntPtr ppwszValue, out uint pcchLength)
{
var hr = _type.GetAllocatedString(guidKey, ppwszValue, out pcchLength);
Trace("guid: " + guidKey.ToName() + " pv: " + ppwszValue + " len: " + pcchLength + " hr: " + hr);
return(hr);
}