枚举正在运行的IE实例

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

public delegate bool IECallBack(int hwnd, int lParam);

namespace RunningInstanceOfIE
{
    public class IEInstance : Form //Form is a class in System.Windows.Forms namespace
    {
        [DllImport("user32.Dll")]
        public static extern int EnumWindows(IECallBack x, int y); 
        [DllImport("User32.Dll")]
        public static extern void GetWindowText(int h, StringBuilder s, int nMaxCount);
        [DllImport("User32.Dll")]
        public static extern void GetClassName(int h, StringBuilder s, int nMaxCount);
        [DllImport("User32.Dll")]
        public static extern IntPtr PostMessage(IntPtr hWnd, int msg, int wParam, int lParam);
        
        private Button GetIE; //Button is a class in System.Windows.Forms namespace
        private Button RemoveIE; 
        private Label label1;//Label is a class in System.Windows.Forms namespace
        private ListBox listBox1; //ListBox is a class in System.Windows.Forms namespace
        private Container components = null;//Container is a class in System.ComponentModel namespace
        static IntPtr listBoxHandle;// IntPtr is a class in System namespace
        static IntPtr windowHandle;
        static StringBuilder sb, sbc;
        static int i =0;
        static ArrayList myAl;

        public IEInstance() //Constructor
        {
            InitializeComponent();
        }

        Windows Form Designer generated code#region Windows Form Designer generated code
        private void InitializeComponent()
        {
            this.GetIE = new System.Windows.Forms.Button();
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.RemoveIE = new System.Windows.Forms.Button();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            
            // GetIE
            this.GetIE.Location = new System.Drawing.Point(40, 344);
            this.GetIE.Name = "GetIE";
            this.GetIE.TabIndex = 1;
            this.GetIE.Text = "GetIE";
            this.GetIE.Click += new System.EventHandler(this.GetIE_Click);
            
            // listBox1
            this.listBox1.Location = new System.Drawing.Point(24, 24);
            this.listBox1.Name = "listBox1";
            this.listBox1.Size = new System.Drawing.Size(448, 251);
            this.listBox1.TabIndex = 0;
            this.listBox1.Click += new System.EventHandler(this.onlistBox_Select);
             
            // RemoveIE
            this.RemoveIE.Enabled = false;
            this.RemoveIE.Location = new System.Drawing.Point(140, 344);
            this.RemoveIE.Name = "RemoveIE";
            this.RemoveIE.TabIndex = 2;
            this.RemoveIE.Text = "CloseIE";
            this.RemoveIE.Click += new System.EventHandler(this.RemoveIE_Click);
            
            // label1
            this.label1.Location = new System.Drawing.Point(32, 288);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(296, 23);
            this.label1.TabIndex = 3;
            this.label1.Text = "Total Instances of Internet Explorer :";
                         
            // IEInstance
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(500, 400);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.label1,
                                                                      this.GetIE,
                                                                      this.RemoveIE,
                                                                      this.listBox1});
            this.Name = "IEInstance";
            this.Text = "Getting running instances of IE";
            this.ResumeLayout(false);
            myAl = new ArrayList();
        }
        #endregion

        private void GetIE_Click(object sender, System.EventArgs e)
        {
            listBoxHandle = listBox1.Handle;
            EnumWindows (new IECallBack(IEInstance.EnumWindowCallBack), (int)listBoxHandle) ;
            label1.Text = "Total Instances of Internet Explorer : "+i;
        }

        private static bool EnumWindowCallBack(int hwnd, int lParam) 
        { 
             windowHandle = (IntPtr)hwnd;
             listBoxHandle = (IntPtr)lParam;
            ListBox lb =(ListBox)ListBox.FromHandle(listBoxHandle);
            sb = new StringBuilder(1024);
            sbc = new StringBuilder(256);
            GetClassName(hwnd,sbc,sbc.Capacity);
            GetWindowText((int)windowHandle, sb, sb.Capacity);
            
            String xMsg  = sb+" "+sbc+" "+windowHandle;
                if( sbc.Length > 0 )
                {
                    /**//*if (xMsg.IndexOf("全国") > -1) 
                    {
                        string s1 = sbc.ToString();
                        string s2 = sb.ToString();
                        
                        MessageBox.Show( xMsg);
                    }*/
                    if( sbc.ToString().Equals("TfrmMain"))//IEFrame, TtzTaizhangDsg
                    {
                        myAl.Add(windowHandle);
                        i++;
                        lb.Items.Add(xMsg);    
                    }
                }
            return true;
        }

        public static void Main() 
        {
            Application.Run(new IEInstance());
        }
        

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        private void RemoveIE_Click(object sender, System.EventArgs e)
        {
                int index=listBox1.SelectedIndex;
                listBox1.Items.RemoveAt(index);
                int count =0;
                System.Collections.IEnumerator myEnumerator = myAl.GetEnumerator();
                while ( myEnumerator.MoveNext() )
                {
                    if ( count == index )
                    {
                        listBoxHandle = (IntPtr)myEnumerator.Current;
                        break;
                    }
                    count++;
                }
                PostMessage(listBoxHandle,0x0010/**//*WM_CLOSE*/,0,0);
                myAl.RemoveAt(count);
                i--;
                label1.Text = "Total Instances of Internet Explorer :" +i;
                RemoveIE.Enabled=false;
        }

        private void onlistBox_Select(object sender, System.EventArgs e)
        {
            RemoveIE.Enabled=true;
        }

    }
}