using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace IOB_WIN
{
  public partial class MainForm : Form
  {
    public MainForm()
    {
      InitializeComponent();
    }

    protected void closeActiveChild()
    {
      if (this.HasChildren)
      {
        try
        {
          this.ActiveMdiChild.Close();
          this.LayoutMdi(MdiLayout.TileHorizontal);
        }
        catch
        { }
      }
    }

    protected void openChild()
    {
      TestForm child = new TestForm();
      child.MdiParent = this;
      child.Show();
      this.LayoutMdi(MdiLayout.TileHorizontal);
    }

    private void closeChildToolStripMenuItem_Click(object sender, EventArgs e)
    {
      closeActiveChild();
    }

    private void openChildToolStripMenuItem_Click(object sender, EventArgs e)
    {
      openChild();
    }
  }
}