Worked on enhancing the drawing tool in the semicolon213/2024_GuestBook_T1 repository, focusing on refining pen brush stroke thickness and spray density to improve visual fidelity and responsiveness. Utilized C++, GDI+, and the Windows API to refactor pen functionality and update mouse event handling, ensuring more accurate and reliable input processing. The technical approach involved parameter tuning and targeted code restructuring, which resulted in smoother brush strokes and reduced input lag. These improvements contributed to a more seamless and engaging user experience, laying a solid foundation for future feature development and maintainability within the drawing tool’s codebase.