There was a voting held in October 1994 which led to Finland becoming a part of the European Union.
After Finland joined EU it also became a part of the European Economic and Monetary Union, which is one of the many projects run by EU. Finland is a big part of the decision making process in the EU. Finland has been working in a project called The Cohesion Fund which concentrates on supporting three goals: the convergence of the environmental project, regional competitiveness and co-operation. There is also a project called the European Social Fund and the European Regional Development Fund Project but these are only a few of the things that the Finnish have been involved in.
There have been many positive things that have happened in Finland after joining this union. For example: the currency changed into euros, the EU has funded many projects and businesses and most of all there's been a lot of employment in Finland, over 1000 Finns work in the European Union!