求大佬帮改个代码，获取微信指定窗口标题的最后一条消息

代码修改自 微信弹幕消息 这个动作，目前已经可以实现获取类名ChatWnd下的最后一条消息。但是平时会有多个群，多个ChatWnd，想要改成获取指定窗口标题的最后一条消息。

//.cs 文件类型，便于外部编辑时使用
// 引用必要的命名空间
//css_dir C:\Windows\Microsoft.NET\assembly\GAC_MSIL\** 
//css_ref UIAutomationClient.dll

using System.Collections.Generic;
using System.Windows.Automation;

// Quicker将会调用的函数
public static void Exec(Quicker.Public.IStepContext context)
{    List <string> my_list = new List<string>();
    AutomationElement root = AutomationElement.RootElement;
    AutomationElement wx_win = root.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.ClassNameProperty, "ChatWnd"));
    AutomationElement msg_list = wx_win.FindFirst(TreeScope.Descendants, new PropertyCondition(AutomationElement.NameProperty, "消息"));
    if (msg_list != null)
    {
        AutomationElementCollection all_msg = msg_list.FindAll(TreeScope.Children,
                                                           new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.ListItem));
        
        if (all_msg.Count > 0)
        {
            AutomationElement last_item = all_msg[all_msg.Count - 1];
            AutomationElementCollection name = last_item.FindAll(TreeScope.Descendants,
                                                                new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Button));
            
            if (name.Count == 2)
            {
                if (last_item.Current.Name == "[地理位置]")
                {
                    AutomationElementCollection text = last_item.FindAll(TreeScope.Descendants,
                                                                          new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Text));
                    my_list.Add(name[1].Current.Name + ":" + last_item.Current.Name + "\n" + text[0].Current.Name + "\n" + text[1].Current.Name);
                }
                else
                {
                    my_list.Add(name[1].Current.Name + ":" + last_item.Current.Name);
                }
            }
            else if (name.Count == 1)
            {
                my_list.Add(name[0].Current.Name + ":" + last_item.Current.Name);
            }
        }
    }
    context.SetVarValue("new_list", my_list); // 向变量里输出值
}