自己用GDI实现的简单类似于画板的程序，源码详尽，适合初学者学习-Own use GDI achieved a simple procedure similar to the drawing board, source code in detail, suitable for beginners to learn

计算机图形学的相关程序 如DDA画直线 DDA画圆 DDA画椭圆 裁剪-Computer graphics-related programs such as circle DDA DDA DDA line drawing painting oval cut.