default:
                        break;
                }
            }
        }
        private void LoadStar()
        {
            this.MDataItem.Enabled = false;
            this.MResearchItem.Enabled = false;
            this.MMarketItem.Enabled = false;
            this.MCompactItem.Enabled = false;
            this.MStatisticsItem.Enabled = false;
            this.MS_Login.Enabled = true;
            this.MS_LoginoutItem.Enabled = false;
            this.MS_PwdItem.Enabled = false;
            logininPic.Enabled = true;
            loginoutPic.Enabled = false;
            exitPic.Enabled = true;
            findPic.Enabled = false;
            this.statusServer.Text = "已连接";
            this.statusUser.Text = "<无T>";
        }
        private void MS_UserItem_Click(object sender, EventArgs e)
        {
            LoginShow('u');
            this.Hide();
        }

        private static void LoginShow(char ch)
        {
            Login lg = new Login(ch);
            lg.Show();            
        }
        private void MS_AdminItem_Click(object sender, EventArgs e)
        {
            LoginShow('a');
            this.Hide();
        }
        private void MS_SuperItem_Click(object sender, EventArgs e)
        {
            LoginShow('s');
            this.Hide();
        }
        private void MH_AboutItem_Click(object sender, EventArgs e)
        {
            CarAbout ca = new CarAbout(); C#汽车销售系统财务管理和销售管理设计(12):http://www.youerw.com/jisuanji/lunwen_2321.html