Upvote:1
Since the WH visa is a category "D" (=national) visa, the following applies:
Third-country nationals with a national residence permit issued by a Schengen country may, for the duration of its validity, travel for up to 90 days per 180-day period to any other Schengen country. This also applies to holders of a national visa (category āDā visa) issued by a Schengen country.
Source: http://www.auswaertiges-amt.de/EN/EinreiseUndAufenthalt/Schengen.html