using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using Microsoft.Win32;
using System.Runtime.InteropServices;
using EasyHook;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form,IEntryPoint
    {
        delegate IntPtr MessageBoxWCallback(int hwnd, IntPtr lpText, IntPtr lpCaption, int wType);

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            var MyHook = LocalHook.Create(LocalHook.GetProcAddress("user32.dll", "MessageBoxW"),
                new MessageBoxWCallback(MessageBoxWProc), this);

            MyHook.ThreadACL.SetExclusiveACL(new Int32[] { 0 });
        }

        static IntPtr MessageBoxWProc(int hwnd, IntPtr lpText, IntPtr lpCaption, int wType)
        {
            return new IntPtr(0);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show("ok");
        }
    }
}