Options.UpdateStyleListBehavior (Word)

Returns or sets a WdUpdateStyleListBehavior constant that specifies the behavior Word should take when updating a style to match a selection that contains numbering or bullets. Possible return values are wdListBehaviorAddBulletsNumbering - Adds the numbering or bullets pattern of the selection to all paragraphs in the document that use the same style, wdListBehaviorKeepPreviousPattern - Keeps the existing numbering or bullets pattern for all other paragraphs that use the same style and does not apply the numbering or bullets pattern of the selection.

Setting this property has the same effect as selecting an item in the dropdown list in the Word Options dialog (Advanced tab, Editing options, Updating style to match selection:.

Options.UpdateStyleListBehavior = wdListBehaviorAddBulletsNumbering