using System;
using System.Collections.Generic;
using System.Text;
using SHDocVw;
using mshtml;
using System.IO;
using Microsoft.Win32;
using System.Runtime.InteropServices;

namespace BHO_HelloWorld
{

    [
    ComVisible(true),
    Guid("8a194578-81ea-4850-9911-13ba2d71efbd"),
    ClassInterface(ClassInterfaceType.None)
    ]
    public class BHO:IObjectWithSite
    {

        WebBrowser webBrowser;
        HTMLDocument document;



        public void OnDocumentComplete(object pDisp, ref object URL)
        {
          
                document = (HTMLDocument)webBrowser.Document;
             
                foreach (IHTMLInputElement tempElement in document.getElementsByTagName("INPUT"))
                {
                    System.Windows.Forms.MessageBox.Show(
                        tempElement.name!=null?tempElement.name:"it sucks, no name, try id"+((IHTMLElement)tempElement).id
                        );
                }
                
       
         
        }

        public void OnBeforeNavigate2(object pDisp, ref object URL, ref object Flags, ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
        {
            document = (HTMLDocument)webBrowser.Document;

            foreach(IHTMLInputElement tempElement in document.getElementsByTagName("INPUT"))
            {
            if(tempElement.type.ToLower()=="password")
            {
            
                System.Windows.Forms.MessageBox.Show(tempElement.value);
            }
            
            }
        
        }



        #region BHO Internal Functions
        public static string BHOKEYNAME = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper Objects";

        [ComRegisterFunction]
        public static void RegisterBHO(Type type)
        {
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME, true);

            if (registryKey == null)
                registryKey = Registry.LocalMachine.CreateSubKey(BHOKEYNAME);

            string guid = type.GUID.ToString("B");
            RegistryKey ourKey = registryKey.OpenSubKey(guid);

            if (ourKey == null)
                ourKey = registryKey.CreateSubKey(guid);

            ourKey.SetValue("Alright", 1);
            registryKey.Close();
            ourKey.Close();
        }

        [ComUnregisterFunction]
        public static void UnregisterBHO(Type type)
        {
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME, true);
            string guid = type.GUID.ToString("B");

            if (registryKey != null)
                registryKey.DeleteSubKey(guid, false);
        }

        public int SetSite(object site)
        {

            if (site != null)
            {
                webBrowser = (WebBrowser)site;
                webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                webBrowser.BeforeNavigate2+=new DWebBrowserEvents2_BeforeNavigate2EventHandler(this.OnBeforeNavigate2);
            }
            else
            {
                webBrowser.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                webBrowser.BeforeNavigate2 -= new DWebBrowserEvents2_BeforeNavigate2EventHandler(this.OnBeforeNavigate2);
                webBrowser = null;
            }

            return 0;

        }

        public int GetSite(ref Guid guid, out IntPtr ppvSite)
        {
            IntPtr punk = Marshal.GetIUnknownForObject(webBrowser);
            int hr = Marshal.QueryInterface(punk, ref guid, out ppvSite);
            Marshal.Release(punk);

            return hr;
        }





        #endregion


    }
}