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.