I read above some confusion about entering Schengen Zone countries.
The FIRST entry into the Zone of a new (unused) Visa should be into the country that you applied to for that Visa. You should get it stamped by that country's entry border people as proof you did. That validates the Visa.
Once validated you are free to enter and exit the Zone through any member country as often as you wish until the Visa expires. This includes crossing the borders between member countries - which are virtually non-existant.
If the first entry according to Passport stamps is not from the issuing country that country will not issue you with another Visa (if the Clerk follows the rules). Also they can refuse a further Visa if the majority of past Visa use appear (from Passport stamps) to be in another country - "Go to them. Application refused!".
Apart from possibly Norway where I don't know (AliBaba may be thinking EU Customs Controls are Border Controls), you can move around between member countries without Border controls. Thats the whole idea of the Schengen Agreement!
Airlines always ask to see passports or other identity for security purposes even if on a Zone internal flight. On flights into the Zone they also ask to see it for a second reason also - so they don't get the bill for taking you back if you did not have a valid Passport/Visa for entry on landing.
My Partner needs Schengen Visas (I do not) and over the last 5 years we have regularly entered Estonia, Latvia, Lithuania, Poland, Germany, Holland, Belgium, France, Italy, Spain, Portugal and Sweden - by air, rail and road - from outside the Zone (Russia or UK) as well as 'internally' from within the Zone, moving among those countries.
Sometimes at the French Entry Eurotunnel control there is no-one on duty, or too busy reading the paper and just wave us through without even seeing a Passport cover, but we stay there until someone appears and insist they stamp her Passoprt for the reasons above.
We make sure we know the rules, and make sure we get it right, because she needs continuing Visas for business purposes - as well as being with me!!
If you don't trust our experience it's all here -
Schengen Area - Wikipedia, the free encyclopedia
if you believe Wiki, that is.