Worked on stabilizing the canvas drawing interaction for the guest book feature in the semicolon213/2024_GuestBook_T1 repository, focusing on improving reliability and user experience. Addressed a critical bug in input handling by refining the initiation and termination flow of drawing actions, ensuring the canvas correctly tracked active and inactive states. Enhanced mouse event mapping so drawing only triggered under appropriate conditions and coordinates were accurately processed. The work involved C++ development, GUI development, and Windows API, with careful debugging and patch-based releases. These improvements reduced drawing errors, increased data integrity, and contributed to a smoother, more dependable user workflow.