ver3.5

Source Insight >  Options > Preferences > Language: > Select “C++   Language” > Click “Doc Types” button on the right side > Document   Options > Add *.cc to “File   filter”

http://fullofc.blogspot.kr/2012/05/how-add-cc-extension-in-source-insight.html
를 참고하면 된다



ver4.0

Source Insight >  Options > Preferences > Language > FileTypes