[CODE]
using System;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.VisualStudio.Tools.Applications.Runtime;
using Word = Microsoft.Office.Interop.Word;
using Office = Microsoft.Office.Core;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using Microsoft.Office.Core;

namespace WordDocument
{
    public partial class ThisDocument
    {

        private CommandBarButton MyButton;
  private void ThisDocument_Startup(object sender, System.EventArgs e)
        {
           
            MyButton.Click += new Microsoft.Office.Core._CommandBarButtonEvents_ClickEventHandler(MyButton_Click);
  }

  public void MyButton_Click(CommandBarButton cmdBarbutton, ref bool cancel)
        {
            System.Windows.Forms.MessageBox.Show("Com add-in premuto");
            

        }
    }
}
[/CODE]