$subKey= $key->Open( $sSubKey, $rhOptions ) The Open method opens a Registry key and returns a new Win32::TieRegistry object associated with that Registry key. If Open is called via a reference to a tied hash, then Open returns another reference to a tied hash. Otherwise Open returns a simple object and you should then use TiedRef to get a reference to a tied hash. $sSubKey is a string specifying a subkey to be opened. Alternately $sSubKey can be a reference to an array value containing the list of increasingly deep subkeys specifying the path to the subkey to be opened. ...