Add-on for VB6 to find all references, etc? [closed]

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I was working with VB6 last year and I used an Add-on that made it possible to search not only for the definition of objects or functions but also find all references or calls of specific objects or functions.

Unfortunately I can't remember where I got it from. Can anybody help on that?

Thanks in advance!

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MZTools.

It is the essential free tool for all VB6 and VBA developers.