using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Text;

//Add two new namespaces
using Autodesk.Navisworks.Api;
using Autodesk.Navisworks.Api.Plugins;


namespace BasicPlugIn
{
   [PluginAttribute("BasicPlugIn.ABasicPlugin",                   //Plugin name
                    "ADSK",                                       //4 character Developer ID or GUID
                    ToolTip = "BasicPlugIn.ABasicPlugin tool tip",//The tooltip for the item in the ribbon
                    DisplayName = "Hello World Plugin")]          //Display name for the Plugin in the Ribbon

   public class ABasicPlugin : AddInPlugin                        //Derives from AddInPlugin
   {
      public override int Execute(params string[] parameters)
      {
         MessageBox.Show(Autodesk.Navisworks.Api.Application.Gui.MainWindow, "Hello World");
         return 0;
      }
   }
}