The Netherlands embassy in Copenhagen does not issue visa.
Denmark is part of the Schengen area. Do you have the nationality of Denmark? Or do you have a valid Schengen visa or a residence permit for Denmark? Then you do not need to apply for a short-stay Caribbean visa to travel to the Caribbean part of the Netherlands (Aruba, Bonaire, Curaçao, Saba, St Eustatius or St Maarten).
In case you do need a short-stay Caribbean visa, please send an e-mail to the Netherlands embassy in Copenhagen with your full name, contact details and your situation. The embassy will inform you about the possibilities.