I can't see why you'd need a function, when what you're after can be done via a loop in the main sub. See, for example, in order of increasing complexity:
https://www.msofficeforums.com/word-...html#post55215
https://www.msofficeforums.com/word-...html#post93792
https://www.msofficeforums.com/word-...html#post72330
https://www.msofficeforums.com/word-...html#post93796

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]