You apply for a short stay visa to a Dutch representation abroad. You cannot apply for this to the IND.
Do you sponsor someone who wishes to come to the Netherlands for a short stay and you are married? Then both you and your spouse sign the proof of sponsorship.
You can sponsor multiple persons. You then fill in a separate form 'Proof of Sponsorship and/or private accommodation' for each person.
The Visa Information System (VIS) is the system used by the Schengen countries to exchange information about visa. Read more about the Visa Information System (VIS) in this factsheet.