基于VC6.0环境下，鼠标绘制各种图形操作，如画线，画矩形等。代码中注释的代码部分可以取消注释，得到不同的画法。-Based on the VC6.0 environment, the mouse to draw a variety of graphics operations, picturesque line, draw rectangle, etc.. Code comments in the code part can be canceled to get different drawi