using System;
using System.Windows.Forms;
 
namespace FormTest
{
    public partial class Form1 : Form
    {
 
        Button btnBlock = new System.Windows.Forms.Button();
 
 
        [System.Runtime.InteropServices.DllImportAttribute("user32.dll", _
          EntryPoint = "BlockInput")]
        [return: System.Runtime.InteropServices.MarshalAsAttribute( _
        System.Runtime.InteropServices.UnmanagedType.Bool)]
        public static extern bool BlockInput( _
        [System.Runtime.InteropServices.MarshalAsAttribute
           (System.Runtime.InteropServices.UnmanagedType.Bool)] bool fBlockIt);
 
 
        public frmBookmark()
        {
            InitializeComponent();
        }
 
 
        private void frmBookmark_Load(object sender, EventArgs e)
        {
 
            btnBlock.Parent = this;
            this.btnBlock.Click += new System.EventHandler(this.btnBlock_Click);
        }
 
 
        private void btnBlock_Click(object sender, EventArgs e)
        {
 
            TimeSpan ts = new TimeSpan(0,0,0,5);
            Block_Input(ts);
        }
 
 
        public static void Block_Input(TimeSpan span)
        {
            try
            {
                BlockInput(true);
                System.Threading.Thread.Sleep(span);
            }
            finally
            {
                BlockInput(false);
            }
 
        }
    }
}