[cstelter]

when you hover over the words underscored in red-- what sort of quick fixes does it offer?

If it offers something like 'Import Command from wpilib' or maybe 'Import AutonomousCommnad from AutonomousCommand.java' then take those options.

If it doesn't offer either of these, perhaps you haven't put all your source where it belongs, or you did not start with Eclipse for C/C++ and instead started with Eclipse for Java (we did that and things did not work until we switched to the C/C++ version as prescribed in the screensteps).