I would like to use my own enum in a project setting (from Visual studio, menu project, properties, tab settings).
I can select a lot of default types there, but even types from other projects in my solution, but not the project itsself.
Is it possible to use an enumeration type from the project itsself as type for a setting?
Yes, but it takes a bit of twiddling. See this article for pointers on how to accomplish it.