Definitely a nice-to-know function, but sadly not what I'm looking for.

What I intend to do in the end is to get a list of viable resolutions according to the users system and then do a matchup between supported resolutions by my "game". Not that there is any game as of yet, but atm I'm messing around with panels and stuff and trying to create a main menu-settings-screen to get the hang of the Lite-C and 3DGS-workflow.

That's exactly what EnumDisplaySettings does. The parameter "0" gives you the first available resolution. By iterating this parameter until rvalue is false, you can get a list of all resolutions. This is what I'd like to do in the end.