一个简单的基于VC++的画图程序，主要是画线，画圆，画椭圆等并可以自由设置其线宽与线形，画出来的图形能同时出现起点和终点坐标-A simple drawing based on VC++ program, mainly drawing a line, circle, ellipse, etc. and are free to set its width and alignment, drawn graphics can simultaneously start and end coordinat