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代码清单1 window_update_scope的节略本

/* /////////////////////////////////////////////////////////////

 *

 * ...

 *

 * Extract from winstl_window_update_scope.h

*摘录自 winstl_window_update_scope.h

 *

 * www:        

 *             

 *

 * 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://{域名已经过期}.au/licenses/ssssl.html)

* (由Synesis Software Standard Source License授权许可:

 *  http://{域名已经过期}.au/licenses/ssssl.html)

 *

 * ...

 *

 * ////////////////////////////////////////////////////////// */

...

namespace winstl

{

    class window_update_scope

    {

// Construction

// 构造

    public:

        // Takes a HWND and changes it's current update-status,)

        // which is set back to the original state in the

        // destructor.

// 取得HWND 句柄并改变其当前更新状态，在析构器中设置其回到初始状态。

        ws_explicit_k window_update_scope(HWND hwnd)

            : m_bIsLocked(hwnd != NULL && ::LockWindowUpdate(hwnd))

        {}

        ~window_update_scope() winstl_throw_0()

        {

            if(m_bIsLocked)

            {

                // Lock was successful, so undo here

// 锁定成功，因此此处反向操作

                ::LockWindowUpdate(NULL);

            }

        }

// Members 

//成员变量

    protected:

        ws_bool_t   m_bIsLocked;

// Not to be implemented 

//不被实现

    private:

        window_update_scope(window_update_scope const &rhs);

        window_update_scope const

            &operator =(window_update_scope const &rhs);

    };

} // namespace winstl 

//名称空间winstl