During August 2025, Huiyu Eun developed a CustomHighlightOverlay feature for the Samsung/TizenFX repository, focusing on enhancing accessibility within the NUI framework. Using C# and C++ with interop techniques, Huiyu implemented a reusable overlay component that allows developers to add and reset accessibility highlights across user interface elements. The solution included a public API and interop methods to control the overlay’s position and size, enabling flexible integration into various applications. By addressing accessibility needs through a modular approach, Huiyu’s work provided a consistent method for managing visual highlights, improving the overall accessibility coverage for TizenFX-based applications.