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

namespace Demo
{
  
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
      
        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox(0,"hello", "thanks",0);
        }
        
        [DllImport("USER32.DLL")]
        private static extern int MessageBox(int s,string h,string r,int l);

        private void Form2_Load(object sender, EventArgs e)
        {

        }

       
    }
}