Retrieves metadata for a stream using IStream::Stat.
_StreamGetStat(ByRef $oStream, ByRef $pStatFlag[, $grfStatFlag])
| $oStream | IStream COM object. |
| $pStatFlag | [out] Pointer to the STATSTG structure. |
| $grfStatFlag | [optional] STATFLAG flags (default: $STATFLAG_DEFAULT). |
| Success: | 1 |
| Failure: | 0, sets @error to: 1 - Invalid stream object. 2 - Memory allocation failed. 3 - COM error (HRESULT in @extended). |