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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, OleCtrls, SHDocVw, ActiveX;

type
  TForm1 = class(TForm)
    WebBrowser1: TWebBrowser;
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    FOleInPlaceActiveObject: IOleInPlaceActiveObject;
    procedure MsgHandler(var Msg: TMsg; var Handled: Boolean);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormDestroy(Sender: TObject);
begin
  FOleInPlaceActiveObject := nil;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnMessage := MsgHandler;
end;

procedure TForm1.MsgHandler(var Msg: TMsg; var Handled: Boolean);
const
  StdKeys = [VK_BACK, VK_UP, VK_DOWN, VK_LEFT, VK_RIGHT];
var IOIPAO: IOleInPlaceActiveObject;
  Dispatch: IDispatch;
begin
  if WebBrowser1 = nil then
  begin
    Handled := False;
    Exit;
  end;
  Handled := (IsDialogMessage(WebBrowser1.Handle, Msg) = True);
  if (Handled) and (not WebBrowser1.Busy) then
  begin
    if FOleInPlaceActiveObject = nil then
    begin
      Dispatch := WebBrowser1.Application;
      if Dispatch <> nil then
      begin
        Dispatch.QueryInterface(IOleInPlaceActiveObject, IOIPAO);
        if IOIPAO <> nil then FOleInPlaceActiveObject := IOIPAO;
      end;
    end;
    if FOleInPlaceActiveObject <> nil then
      if ((Msg.message = WM_KEYDOWN) or (Msg.message = WM_KEYUP)) and
        (Msg.wParam in StdKeys) then
        //nothing  -  do not pass on Backspace, Left, Right, Up, Down arrows
      else FOleInPlaceActiveObject.TranslateAccelerator(Msg);
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Webbrowser1.Navigate('www.SwissDelphiCenter.ch');
end;

initialization
  OleInitialize(nil);

finalization
  OleUninitialize
end.