模仿WINDOWS画图版的程序的代码，吸取了一些Photoshop的界面经验 -imitate Windows version of the drawing procedure code, learned some Photoshop interface experience

该程序实现了一个类似Windows画图板的小程序。功能和界面全部模仿于Windows自带的画图板。-The program implements a similar drawing board a small Windows program. Functions and interfaces in Windows, bringing all to imitate the drawing board.