说明：  Windows API与Win32 SDK\窗口与句柄\ 消息与消息队列\ GetStockObject()得到画笔、画刷、字体、调色板的句柄，使用时必须用类型 转换\控件的访问\定制应用程序的外观\图形的保存和重绘
(Windows API and the Win32 SDK \ windows and a handle \ messages and message queues \ GetStockObject () by brush, brushes, fonts, color palette of the handle, use type must be converted \ control access to \ customize the appearance of the application \ Graphics save and redraw)