This is another old article, but it may be useful to someone. It originally appeared in The Visual Basic Programmer's Journal, July 2001, Volume 11, Issue 7.

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This is going back a bit, but my article on the Visitor Design Pattern (in VB6) is available on MSDN. It was originally published in The Visual Basic Programmer's Journal, March 2001, Volume 11, Issue 3.
See Here