From Programming Perl(The Camel), 3rd Edition, Page 56, Second paragraph: Variables attached to a lexical scope are not in any package, so lexically scoped variable names may not contains the :: sequence. (Lexically scoped variables are declared with a my declaration.)
Remove the main:: and make it $HKEY_LOCAL_MACHINE.

In reply to Re: Extracting Registry information by Ido
in thread Extracting Registry information by blackadder

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