封装 API 中窗口处理的数据结构和相关函数

提供两类成员函数：

窗口 API 函数：代替 SDK API 函数

消息响应函数：响应各种系统消息

窗口 API 函数例

ShowWindow、ScrollWindow、SetWindowText

消息响应函数例

OnPaint、OnLButtonDown、OnKeyUp、

OnMouseMove、OnClose、OnHScro-Packaging API window of data structure and related functions for both categories of membership function : Windows API functions : to replace the SDK API functions news response function : Responding to various information systems window cases ShowWindow API function, ScrollWindow, SetWindowText news cases OnPaint response function, OnLButtonDown, OnKeyUp, OnMouseMove , OnClose, OnHScro