[villeez]

Run the code through in Softagram analyzer and start digging into the structures using the visual browsing capabilities in Softagram Desktop app. There is free trial at softagram.com where you can do it easily if you happen to have your codes in some Git repo in cloud services such as Bitbucket or GitHub... Shameless self promotion this is however, as I work for the company. But that approach I have also been personally using more than 10 years: static dependency analysis coupled with excellent visual dependency browsing. I think some expensive version of Visual Studio has also similar stuff available.