I'm not familiar with WMI, but here are a few pointers that may help:

• The string you're seeing is OK, it just means that $aevents is a Win32::OLE object, as it should be.
• Check for an error after the ExecQuery call by calling Win32::OLE->LastError. Something like:

  $aevents = $Wmi->ExecQuery(...);
  print "The error code is ", Win32::OLE->LastError(), "\n";
  [download]

• I assume the $if thing is just a copy-and-paste-o.
• One of the best resources I know for working with Perl on Win32 is Dave Roth's web site. A look over there usually turns up useful info. Give it a shot.

Good luck.

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