Compulsive Computer Use and Knowledge Needs in Belgium: A Multi-method Approach (CLICK) is the first large scale study in Belgium to address the topic of compulsive use of the internet (CIU) and computers (CCU) among adults and adolescents. This research has been financed by and carried out under the administration of the Belgian Science Policy Office (Belspo) in the framework of the Federal Research Program Drugs. The set-up and results of the CLICK-project are compiled in the present report.