During October 2024, semicolon213 enhanced the drawing tool in the 2024_GuestBook_T1 repository by refining pen brush stroke thickness and spray density, focusing on improving both visual fidelity and input responsiveness. Using C++, GDI+, and the Windows API, semicolon213 refactored the pen functionality and updated mouse event handling to ensure accurate brush strokes and reduce input lag. The technical approach involved parameter tuning and targeted code restructuring, resulting in smoother and more reliable drawing interactions. This work established a stronger foundation for future enhancements and directly contributed to a more satisfying and engaging user experience within the application.