I was doing exchange programme in France for 4 months. For this, I got the visa for a long stay. Particulars mentioned on my visa are: 1. France (sauf CTOM), 2. From 22-08-2013 till 22-02-2014 3. Type of visa : D 4. Numbers of entries: MULT 5. Durationofstay XXX. I finished my programme in December. Now, I'd like to visit my friends there in February for a week. So, can I reuse my visa again or should I get a new one?
There are several conditions on your visa. You can use it as long as you meet all the conditions.
Condition 2 states that the visa expires on February 22. So you can only visit using this visa if you leave before the 22nd.
Condition 4 states that this is a multiple-entry visa, so there is no restriction here.
Condition 5 gives a maximum length of your stay in Schengen space. Subtract the number of days that you've spent in France as part of your exchange programme. (Partial days count as 1.) You can only visit for a week if you have at least 8 days left.