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;

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

namespace Essai_type_fenetre_2
{
    public partial class Form1 : Form
    {
        [DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern int EnumWindows(CallBack x, int y);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern int GetWindowTextLength(IntPtr hWnd);




        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //Création du callback ou on recoit les résultat du enumwindows.
            CallBack myCallBack = new CallBack(Form1.Report);
            //Appel de la fonction :-)
            EnumWindows(myCallBack, 0);

        }

        public static bool Report(int hwnd, int lParam)
        {
            //Console.Write("Window handle is ");
            //Console.WriteLine(hwnd);

            IntPtr monint = (IntPtr)hwnd;

            int length = GetWindowTextLength(monint);



            StringBuilder sb = new StringBuilder(length + 1);
            GetWindowText(monint, sb, sb.Capacity);
            Console.WriteLine( sb.ToString());


            return true;
        }

    }
}