使用vc++实现的一个简单的画图程序，其中主要是由CMyCADView类中的函数完成了画线的功能，主要是：OnDraw、OnLButtonDown和OnMouseMove这三个函数-Using vc++ implementation of a simple drawing program, which is mainly a function of the class by the CMyCADView completed the painting line, and mainly: OnDra

把鼠标的三个事件响应函数OnLButtonDown，OnMouseMove，OnRButtonUp封装在同一个类Controller中。MFC程序中的M-V-C，控制器编程-Three mouse events response function OnLButtonDown, OnMouseMove, OnRButtonUp, packaged in the same class Controller. The MFC program MVC, controller programming