I am a non EuEU national, who already has a business visa "c"C for 5 years (multiple entry) for Schengen area which allows me to stays 90 days at once. Meanwhile, iI have been accepted at a university in Belgium as a student for a course of 1 year.
I want to ask whether iI can enter Belgium using my current business visa and change it with Belgium authorities to a student visa?
[Meanwhile, since iI have a business visa, iI will be working for one of my home country institutes as their representative in Belgium, where my home country will pay me, which iI will do while studying as student]