Controls in container form come over child form?

Question

In a container form I have menu and buttons to open ther forms.

Here I am fac

Answer 1

I had this problem and solved it this way:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
    [DllImport("user32.dll", SetLastError = true)]
    static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

    Form2 F2;
    public Form1()
    {
        InitializeComponent();
        F2 = new Form2();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        Panel P1 = new Panel();
        P1.Location = new Point(0, 0);
        P1.Height = this.Height;
        P1.Width = this.Width;
        P1.BackColor = Color.Transparent;
        this.Controls.Add(P1);

        SetParent(F2.Handle, P1.Handle);
        F2.Owner = this;

        F2.Show();
    }
}