利用滑鼠建立畫筆功能,透過紅,黃,藍控制項調整畫筆顏色,顯示在調色盤上,進而在畫布上作畫。-To use the mouse to establish pen functions, through red, yellow and blue controls to adjust pen color, displayed in the palette on the canvas and then painting.

不同按键响应相同程序，使用事件响应，初学者，请谅解-Response to the same procedure in different keys, the use of incident response, beginners, please understand