说明：  自绘带滚动条的显示图片控件，需要OnLButtonDown消息需要WS_CHILD | WS_VISIBLE | SS_NOTIFY 窗口样式 使用方法： DWORD lStyle = WS_CHILD | WS_VISIBLE | SS_NOTIFY m_PicShowWnd.Create(_T(""), lStyle, CRect(5, 5, 100, 30),this,102) m_PicShowWnd.ShowWindow(true) 通过程序控制窗口的大小，图片内容及滚动条会自动适应。
(Since the painting scroll bars with the display picture control, need OnLButtonDown message needs WS_CHILD | WS_VISIBLE | SS_NOTIFY window style to use: DWORD lStyle = WS_CHILD | WS_VISIBLE | SS_NOTIFY m_PicShowWnd.Create (_T (" " ), lStyle, CRect (5, 5 , 100, 30), this, 102) m_PicShowWnd.ShowWindow (true) through the program control window size, image content and the scroll bar will automatically adapt.)