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$remote_key = $Registry->Open( "$machine/$root_key", { Access => "KEY_READ" } ) or die "Can't read $root_key: ", regLastError(), "\n";
use Win32::TieRegistry qw( :KEY_ ); # ... $remote_key = $Registry->Open( "$machine/$root_key", { Access => KEY_READ()|KEY_SET_VALUE() } ) or die "Can't read $root_key: ", regLastError(), "\n";