well, if you have obtained visa for Shenggen countries, you can visit those countries or access Switzerland freely. on the other hand, if you just had the visa to Switzerland, u have to apply the visa to other Shenggen countries for whatever purpose. its weird...but works that way. that's all happened last year, 2003.
to avoid any trouble which might be caused, u can consult the airport or the related airline company for further information. normally, one without this specified visa won't be allowed to borad the aircraft should these kind of visas be required.