Creating C++ enums that can be used in Blueprint

Enums are commonly used in C++ as flags or inputs to switch statements. However, what if you want to pass an enum value to or from C++ from a Blueprint? Alternatively, if you want to use a switch statement in Blueprint that uses an enum from C++, how do you let the Blueprint editor know that your enum should be accessible within the editor? This recipe shows you how to make enums visible in Blueprint.