http://pinvoke.net/default.aspx/Interfaces.DWebBrowserEvents2

[ComImport, SuppressUnmanagedCodeSecurity, InterfaceType(ComInterfaceType.InterfaceIsIDispatch), Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D")]
public interface DWebBrowserEvents2
{
      [DispId(0x66)]
      void StatusTextChange([MarshalAs(UnmanagedType.BStr)] string Text);
      [DispId(0x6c)]
      void ProgressChange(int Progress, int ProgressMax);
      [DispId(0x69)]
      void CommandStateChange(int Command, [MarshalAs(UnmanagedType.VariantBool)] bool Enable);
      [DispId(0x6a)]
      void DownloadBegin();
      [DispId(0x68)]
      void DownloadComplete();
      [DispId(0x71)]
      void TitleChange([MarshalAs(UnmanagedType.BStr)] string Text);
      [DispId(0x70)]
      void PropertyChange([MarshalAs(UnmanagedType.BStr)] string szProperty);
      [DispId(250)]
      void BeforeNavigate2([MarshalAs(UnmanagedType.IDispatch)] object pDisp, [In] ref object URL, [In] ref object Flags, [In] ref object TargetFrameName, [In] ref object PostData, [In] ref object Headers, [In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel);
      [DispId(0xfb)]
      void NewWindow2([In, Out, MarshalAs(UnmanagedType.IDispatch)] ref object ppDisp, [In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel);
      [DispId(0xfc)]
      void NavigateComplete2([MarshalAs(UnmanagedType.IDispatch)] object pDisp, [In] ref object URL);
      [DispId(0x103)]
      void DocumentComplete([MarshalAs(UnmanagedType.IDispatch)] object pDisp, [In] ref object URL);
      [DispId(0xfd)]
      void OnQuit();
      [DispId(0xfe)]
      void OnVisible([MarshalAs(UnmanagedType.VariantBool)] bool Visible);
      [DispId(0xff)]
      void OnToolBar([MarshalAs(UnmanagedType.VariantBool)] bool ToolBar);
      [DispId(0x100)]
      void OnMenuBar([MarshalAs(UnmanagedType.VariantBool)] bool MenuBar);
      [DispId(0x101)]
      void OnStatusBar([MarshalAs(UnmanagedType.VariantBool)] bool StatusBar);
      [DispId(0x102)]
      void OnFullScreen([MarshalAs(UnmanagedType.VariantBool)] bool FullScreen);
      [DispId(260)]
      void OnTheaterMode([MarshalAs(UnmanagedType.VariantBool)] bool TheaterMode);
      [DispId(0x106)]
      void WindowSetResizable([MarshalAs(UnmanagedType.VariantBool)] bool Resizable);
      [DispId(0x108)]
      void WindowSetLeft(int Left);
      [DispId(0x109)]
      void WindowSetTop(int Top);
      [DispId(0x10a)]
      void WindowSetWidth(int Width);
      [DispId(0x10b)]
      void WindowSetHeight(int Height);
      [DispId(0x107)]
      void WindowClosing([MarshalAs(UnmanagedType.VariantBool)] bool IsChildWindow, [In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel);
      [DispId(0x10c)]
      void ClientToHostWindow([In, Out] ref int CX, [In, Out] ref int CY);
      [DispId(0x10d)]
      void SetSecureLockIcon(int SecureLockIcon);
      [DispId(270)]
      void FileDownload([In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel);
      [DispId(0x10f)]
      void NavigateError([MarshalAs(UnmanagedType.IDispatch)] object pDisp, [In] ref object URL, [In] ref object Frame, [In] ref object StatusCode, [In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel);
      [DispId(0xe1)]
      void PrintTemplateInstantiation([MarshalAs(UnmanagedType.IDispatch)] object pDisp);
      [DispId(0xe2)]
      void PrintTemplateTeardown([MarshalAs(UnmanagedType.IDispatch)] object pDisp);
      [DispId(0xe3)]
      void UpdatePageStatus([MarshalAs(UnmanagedType.IDispatch)] object pDisp, [In] ref object nPage, [In] ref object fDone);
      [DispId(0x110)]
      void PrivacyImpactedStateChange([MarshalAs(UnmanagedType.VariantBool)] bool bImpacted);
      [DispId(0x111)]
      void NewWindow3([In, Out, MarshalAs(UnmanagedType.IDispatch)] ref object ppDisp, [In, Out, MarshalAs(UnmanagedType.VariantBool)] ref bool Cancel, uint dwFlags, [MarshalAs(UnmanagedType.BStr)] string bstrUrlContext, [MarshalAs(UnmanagedType.BStr)] string bstrUrl);
}