使用C#和WPF在Windows上阻止屏幕截图

using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

namespace ScreenCaptureBlocker
{
    public partial class MainWindow : Window
    {
        private const int GWL_EXSTYLE = -20;
        private const int WS_EX_NOREDIRECTIONBITMAP = 0x00200000;

        [DllImport("user32.dll", SetLastError = true)]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll", SetLastError = true)]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

        public MainWindow()
        {
            InitializeComponent();
        }

        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);

            IntPtr hWnd = new WindowInteropHelper(this).Handle;
            int exStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
            SetWindowLong(hWnd, GWL_EXSTYLE, exStyle | WS_EX_NOREDIRECTIONBITMAP);
        }
    }
}