Runtime/Core/Public/EngineAnnotations.h file

#define TNXFUNC(...)

TNXFUNC() — marks a Construct method for exposure in the script editor.

Optional named parameters (key=value pairs, comma-separated): DisplayName = "My Label" — override the tab label shown in the editor.

Expands to nothing at runtime. The editor's ScriptParser scans source files for this annotation to discover user-exposed functions beyond the built-in lifecycle hooks (PrePhysics, PhysicsStep, PostPhysics, ScalarUpdate).

Usage: TNXFUNC() void FireWeapon(SimFloat dt);

TNXFUNC(DisplayName = "Custom Attack") void CustomAttack();