VC++坐标转换程序，在屏幕坐标和窗口坐标之间转换，里面有两个例子，方法各不相同，实现的效果是一样的，都可以把屏幕坐标转换成窗口坐标。-VC++ coordinate conversion process between the screen coordinates and window coordinates of the conversion, there are two examples of different methods to achieve the effect is the s