Delphi使用WebBrowser不打开新面页

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    WebBrowser1: TWebBrowser;
    procedure Button1Click(Sender: TObject);
    procedure WebBrowser1NewWindow2(Sender: TObject; var ppDisp: IDispatch;
      var Cancel: WordBool);
    procedure tempWBBeforeNavigate2(Sender: TObject;
      const pDisp: IDispatch; var URL, Flags, TargetFrameName, PostData,
      Headers: OleVariant; var Cancel: WordBool);
    procedure WebBrowser1DocumentComplete(Sender: TObject;
      const pDisp: IDispatch; var URL: OleVariant);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
var
  tempWB : TWebBrowser;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Self.WebBrowser1.Navigate('http://www.google.com.hk');
end;

procedure TForm1.WebBrowser1NewWindow2(Sender: TObject;
  var ppDisp: IDispatch; var Cancel: WordBool);
begin
  if not Assigned(tempWB) then tempWB := TWebBrowser.Create(Self);
  tempWB.OnBeforeNavigate2 := Self.tempWBBeforeNavigate2;
  ppDisp := tempWB.OleObject;
end;

procedure TForm1.tempWBBeforeNavigate2(Sender: TObject;
  const pDisp: IDispatch; var URL, Flags, TargetFrameName, PostData,
  Headers: OleVariant; var Cancel: WordBool);
begin
  Self.WebBrowser1.Navigate(Url);
  Cancel := True;
end;

procedure TForm1.WebBrowser1DocumentComplete(Sender: TObject;
  const pDisp: IDispatch; var URL: OleVariant);
begin
  if Assigned(tempWB) then FreeAndNil(tempWB);
end;

end.