using System;
using System.Runtime.InteropServices;

namespace App
{
 
   public class LockDown
   {

     public LockDown() { }
	 
     [DllImport("coredll.dll", EntryPoint="FindWindow")]
     private static extern IntPtr FindWindow(string lpClassName,string lpWindowName);
	
     [DllImport("coredll.dll", EntryPoint="EnableWindow")]
     private static extern bool EnableWindow(IntPtr hwnd,bool bEnable);

     public static bool Execute(bool enabled)
     {

        IntPtr hwnd = FindWindow("HHTaskBar",null);
 
        if (!hwnd.Equals(IntPtr.Zero))
        {

          if (enabled)
          {
             return EnableWindow(hwnd,false);
          }
          else
          {
             return EnableWindow(hwnd,true);
          }
        }
		    
        return true;

     }
 
  }
}

  static void Main() 
  {
    Application.Run(new Form1());
  }

  private void cmdExit_Click(object sender, System.EventArgs e)
  {
    App.LockDown.Execute(false); 
    this.Close();
    Application.Exit(); 
  }

  private void Form1_Load(object sender, System.EventArgs e)
  {
    App.LockDown.Execute(true); 
    this.label1.Text = "Taskbar locked";
  }

  private void cmdUnlock_Click(object sender, System.EventArgs e)
  {
     App.LockDown.Execute(false); 
     this.label1.Text = "Taskbar unlocked";
  }

  private void cmdLock_Click(object sender, System.EventArgs e)
  {
    App.LockDown.Execute(true); 
    this.label1.Text = "Taskbar locked";
  }