/// <summary>

        /// 嵌入子窗体，判断子窗体是否打开了

        /// </summary>

        public static Form1 f;

        public void Form1Show()

        {

            if (f == null || f.IsDisposed)

            {

                f = new Form1

                {

                    WindowState = FormWindowState.Maximized,

                    FormBorderStyle = FormBorderStyle.None,

                    TopLevel = false,

                    Parent = this.tabPage1

                };

                f.Show();

            }

        }