private void FormMain_Load(object sender, EventArgs e)

        {

            superTabControl2.Tabs.Clear();

            timer1.Start();

            buttonX1_Click(null, null);

        }

        /// <summary>

        /// 创建或者显示一个多文档界面

        /// </summary>

        /// <param name="caption">窗体标题</param>

        /// <param name="formType">窗体类型</param>

        public void SetMdiForm(string caption,Type formType)

        {

            #region

                         var tab = superTabControl2.Tabs

               .Cast<SuperTabItem>()

               .FirstOrDefault(x => x.Text == caption && x.AttachedControl.GetType() == formType);

                //如果在现有Tab页面中没有找到，那么就要初始化了Tab页面了

                if (tab==null)

                {

                    var form = Activator.CreateInstance(formType) as Form;

                    form.TopLevel = false;

                    form.FormBorderStyle = FormBorderStyle.Fixed3D;

                    form.Dock = DockStyle.Fill;

                    //form.Visible = true;

                    tab = new SuperTabItem();

                    tab.Name = caption;

                    tab.Text = caption;

                    tab.AttachedControl=form as Control;

                    superTabControl2.Tabs.Add(tab);

                    superTabControl2.SelectedTab = tab;

                    superTabControlPanel4.Controls.Add(form);

                            }

                superTabControl2.SelectedTab = tab;

            #endregion

        }

        private void buttonXSetPwd_Click(object sender, EventArgs e)

        {

            SetMdiForm("修改用户名和密码",typeof(FormSetPwd));

        }