Click on File | Add C++ Class.... Choose to derive from GameplayTask. To do so, you must first tick Show All Classes, and then type gameplaytask into the filter box. Click on Next:
Name your C++ class (something like GameplayTask_TaskName is the convention), then add the class to your project. The example spawns a particle emitter and is called GameplayTask_CreateParticles:
Once your GameplayTask_CreateParticles.h and .cpp pair are created, navigate to the .h file and update the class to the following:
#pragma once#include ...
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