枚举所有QQ窗口（C#调API）

【核心代码】

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 ;
using System.Collections;

namespace 枚举所有QQ窗口
{
    public partial class Form1 : Form
    {
        public delegate bool CallBack(int hwnd, int  lParam);
        public Form1()
        {
            InitializeComponent();
        }

        public class API1
        {
            public static ArrayList ii = new ArrayList();
            public static string[] jj = new string[10];
            public int insidenum = 0;

            [DllImport("user32")]

            public static extern int EnumWindows(CallBack x, int y);
            [DllImport("user32")]
            public static extern int GetWindowText(int hwnd, StringBuilder lptrString, int nMaxCount);
            [DllImport("user32")]
            public static extern int GetClassNameA(int hwnd, StringBuilder lptrString, int nMaxCount);
            [DllImport("user32")]
            public static extern int GetParent(int hwnd);
            [DllImport("user32")]
            public static extern int IsWindowVisible(int hwnd);        

            public  bool Report(int hwnd, int lParam)
            {
                StringBuilder classname = new StringBuilder(256);
                GetClassNameA(hwnd, classname, classname.Capacity);
                string leiname = "";
                leiname = classname.ToString();

                int pHwnd;
                pHwnd = GetParent(hwnd);

                if (pHwnd == 0 && IsWindowVisible(hwnd) == 1 && leiname == "TXGuiFoundation")
                {
                    StringBuilder sb = new StringBuilder(512);

                    GetWindowText(hwnd, sb, sb.Capacity);
                    if (sb.Length > 0)
                    {
                        string p = sb.ToString();
                        ii.Add(p);
                        jj[insidenum] = p;
                        insidenum  ;
                    }
                } return true;
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {

            API1.jj[0] = null;
            API1.ii.Clear();
            comboBox1.Items.Clear();
            comboBox1.Text = "";
            API1 api2 = new API1();            
            CallBack myCallBack = new CallBack(api2 .Report );
            API1.EnumWindows(myCallBack, 0);
            if (API1.jj[0] != null)
            {

                foreach (string ui in API1.ii)
                {
                    comboBox1.Items.Add(ui);
                }
                    comboBox1.Text = (API1.ii[0]).ToString();
            }
            else
                MessageBox.Show("任务栏没有QQ窗口", "提示");
        }
    }
}