private void pictureBox1_Click(object sender, EventArgs e)
 {
     try
     {
         Home.Home_pnl.Visible = false;
         AddCustomer _AddCustomer = new AddCustomer();
         _AddCustomer.MdiParent = this;
         _AddCustomer.WindowState = FormWindowState.Maximized;
         _AddCustomer.Show();
         _AddCustomer.Focus();
     }
     catch (Exception ex)
     {
         notifyIcon1.ShowBalloonTip(1000, this.Name, ex.Message, ToolTipIcon.Info); ;
     }
 }
 private void addCustomerToolStripMenuItem_Click(object sender, EventArgs e)
 {
     try
     {
         if (_AddCustomer.IsDisposed)
             _AddCustomer = new AddCustomer();
         Home.Home_pnl.Visible = false;
         _AddCustomer.MdiParent = this;
         _AddCustomer.WindowState = FormWindowState.Maximized;
         _AddCustomer.Show();
         _AddCustomer.Focus();
     }
     catch (Exception ex)
     {
         notifyIcon1.ShowBalloonTip(1000, this.Name, ex.Message, ToolTipIcon.Info); ;
     }
 }