uses ShellAPI;
procedure TForm1.Button1Click(Sender: TObject);
begin
  //用IE打開
  ShellExecute(Handle, 'open', 'IExplore.EXE', 'about:blank', nil, SW_SHOWNORMAL);
  //用火狐打開
  ShellExecute(Handle, 'open', 'firefox.exe', 'about:blank', nil, SW_SHOWNORMAL); 
  //用默認(rèn)瀏覽器打開
  ShellExecute(Handle, 'open', 'Explorer.exe', 'about:blank', nil, SW_SHOWNORMAL);
end;


//另一種調(diào)用IE打開的方法
uses ComObj;
procedure TForm1.Button1Click(Sender: TObject);
  procedure OpenInIE(aURL: string);
  var
    IE: Variant;
  begin
    IE := CreateOleObject('InternetExplorer.Application');
    IE.Visible := true;
    IE.Navigate(aURL);
  end;
begin
  OpenInIE('www.132435.com');
end;


//第二種方法可以有更多控制
procedure TForm1.Button1Click(Sender: TObject);
  procedure OpenInIE(aURL: string);   //need uses ComObj;
  var
    IE: Variant;
  begin
    IE := CreateOleObject('InternetExplorer.Application');
    IE.Visible := true;  {可見}
    IE.left := 0;
    IE.top := 0;
    IE.height := 600;    {高度}
    IE.width := 800;     {寬度}
    IE.menubar := 0;     {取消菜單欄}
    IE.addressbar := 0;  {取消地址欄}
    IE.toolbar := 0;     {取消工具欄}
    IE.statusbar := 0;   {取消狀態(tài)欄}
    //IE.resizable := 0; {不允許用戶改變窗口大小}
    IE.Navigate(aURL);
  end;
begin
  OpenInIE('http://del.cnblogs.com');
end;