Although Word has an 'In Use' property for styles, it is completely misleading since in practice it means 'was used or defined at some stage in the past history of this document or template but may not currently be applied to anything in the active document at this moment in time'. Adding to that, the 'In Use' setting is read only so it is completely worthless.

If you want to manipulate the appearance or non-appearance of styles in the various style lists then you do that by manipulating either the Visibility property or the QuickStyle property. You can do that one at a time by modifying each styles properties, or you can create and run a macro to do it at the click of a button.

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Andrew Lockton
Chrysalis Design, Melbourne Australia