封装了对windows窗口界面绘制相关的所有的消息，完全实现了窗口的自定义，包括到border以及最小化，最大化，关闭按钮的自定义实现-Package for windows window interface for all map-related news, the full realization of a custom window, including the border, as well as minimize, maximize, close button to achieve s