private void button6_Click(object sender, EventArgs e)
        {
            FormCustomerManager fcm = new FormCustomerManager(this);

            fcm.Show();
            this.Visible = false;
        }
        private void 客户列表ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FormCustomerManager fcm = new FormCustomerManager(this);

            fcm.Show();
            this.Visible = false;
        }
 public FormInsertCustomer(FormCustomerManager f)
 {
     InitializeComponent();
     this.f = f;
 }