B4J Question disable screen capture

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("user32.dll")]
        public static extern uint SetWindowDisplayAffinity(IntPtr hwnd, uint dwAffinity);



        private void Form1_Load(object sender, EventArgs e)
        {
            const uint WDA_NONE = 0;
            const uint WDA_MONITOR = 1;
            SetWindowDisplayAffinity(this.Handle, WDA_MONITOR);
        }
    }
}