C#通过窗口名获取程序所有控件句柄

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;


namespace spyTree
{
    public partial class Form1 : Form
    {
        [DllImport（“User32.dll“ EntryPoint = “FindWindow“）]
        private static extern int FindWindow（string lpClassName string lpWindowName）;

        [DllImport（“user32.dll“）]//在窗口列表中寻找与指定条件相符的第一个子窗口
        private static extern int FindWindowEx（
                                              int hwndParent // handle to parent window
                                            int hwndChildAfter // handle to child window
                                              string className //窗口类名            
                                              string windowName // 窗口标题
        ）;

        [DllImport（“User32.dll“ CharSet = CharSet.Auto）]
        public static extern int GetClassName（IntPtr hWnd StringBuilder ClassName int nMaxCount）;

        [DllImport（“user32.dll“）]
        public static extern int GetWindowText（int hwnd StringBuilder lpString int nMaxCount）;//获取窗体标题名称

        [DllImport（“user32.dll“ EntryPoint = “SendMessageA“）]
        public static extern int SendMessage（int hwnd int wMsg int wParam string lParam）;

        public Form1（）
        {
            InitializeComponent（）;
        }
        int WM_GETTEXT = 0x0D;
        private void getChildHwd（int parent_hwdTreeNode treeNode） {
            int past_hwd = 0;
            int i = 1;
            List list = new List（）;
            while（past_hwd!=0||i==1）
            {
                i++;
                past_hwd = FindWindowEx（parent_hwd past_hwd null null）;
                if （past_hwd > 0）
                {
                    StringBuilder sb = new StringBuilder（）;
                    int maxcount=0;
                    IntPtr intsb = new IntPtr（past_hwd）;
                    GetClassName（intsbsb 255）;
                    getChildHwd（past_hwd treeNode.Nodes.Add（past_hwd + “|“ + sb.ToString（）））;
                }
            }
            //return list;
        }

        private void Button1_Click（object sender EventArgs e）
        {
            try
            {
                int intPtr = FindWindow（null window_title_text.Text.Trim（））;
                if （intPtr == 0）
                {
                    MessageBox.Show（“此标题窗口不存在！！！“ “错误“）;
                }
                else
                {
                    treeView1.Nodes.Clear（）;
                    getChildHwd（intPtr treeView1.Nodes.Add（intPtr + “|“ + window_title_text.Text.Trim（）））;
                    //;
                }
            }
            catch （Exception ex） {
                throw ex;
            }
        }
        private int select_node_hwnd = 0;
        private void TreeView1_NodeMouseDouble