代码清单2 window_redraw_scope的节略本
/* /////////////////////////////////
 *
 * ...
 *
 * Extract from winstl_window_redraw_scope.h 
*摘录自winstl_window_redraw_scope.h
 *
 * www:        http://www.synesis.com.au/winstl
 *             http://www.winstl.org/
 *
 * Copyright (C) 2002, Synesis Software Pty Ltd.
 *版权所有(C) 2002, Synesis Software Pty Ltd公司
 * (Licensed under the Synesis Software Standard Source License:
 *  http://www.synesis.com.au/licenses/ssssl.html)
* (由Synesis Software Standard Source License授权许可:
 *  http://www.synesis.com.au/licenses/ssssl.html)
 *
 * ...
 *
 * /////////////////////////////// */

...
namespace winstl
{
 
    class window_redraw_scope
    {
// Construction
// 构造
    public:
        // Takes a HWND and changes it's current redraw-status,
        // which is set back to the original state in the
        // destructor.
       //取得HWND 句柄并改变其当前重画状态，在析构器中设置其回到初始状态。
        ws_explicit_k window_redraw_scope(HWND hwnd,
                        ws_bool_t bInvalidateOnUnlock = true)
            : m_hwnd(hwnd)
            , m_bInvalidateOnUnlock(bInvalidateOnUnlock)
        {
            ::SendMessage(m_hwnd, WM_SETREDRAW, false, 0L);
        }
 
        ~window_redraw_scope() winstl_throw_0()
        {
            ::SendMessage(m_hwnd, WM_SETREDRAW, true, 0L);
 
            if(m_bInvalidateOnUnlock)
            {
                ::InvalidateRect(m_hwnd, NULL, true);
            }
        }
　　// Members
// 成员变量
    protected:
        HWND        m_hwnd;
        ws_bool_t   m_bInvalidateOnUnlock;
　　// Not to be implemented
// 不被实现
    private:
        window_redraw_scope(window_redraw_scope const &rhs);
        window_redraw_scope const
            &operator =(window_redraw_scope const &rhs);
   };
} // namespace winstl 名称空间