鼠标滚轮放大缩小方向修改

 

   AE开发程序，鼠标滚轮放大缩小方向修改问题：
    /// <summary>
        /// 滚动鼠标中键，往前地图放大，往后缩小           /// </summary>
        void ReverseMouseWheel()
        {
            try
            {
                RegistryKey setKey;
                //打开 HKEY_CURRENT_USER\Software\ESRI\ArcMap\Settings
                setKey = Registry.CurrentUser.OpenSubKey("Software\\ \\ESRI\\\\ArcMap\\\\Settings", true);
                if (setKey != null)
                {
                    if (setKey.GetValue("ReverseMouseWheel") == null)
                    {
                        setKey.SetValue("ReverseMouseWheel", "0",RegistryValueKind.DWord);
                    }
                    else if (setKey.GetValue("ReverseMouseWheel").ToString() != "0")
                    {
                        setKey.SetValue("ReverseMouseWheel", "0");
                    }
                }
               
            }
            catch { }
        }