I am a national from Mexico, currently an exchange student following a program in France and have a "long séjour" residence permit (multiple entry visa). During the summer holidays, I plan to travel outside Europe, and then I will return to Europe to continue my studies but I want to enter from Spain (my French visa will be still valid). Will this cause any trouble? Or do I need to re-enter Europe on the country that issued my visa (i.e. France)?
Also, is any visa issued from any Schengen country considered as a "Schengen visa"?