using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Test.WindowsMessage
{
    /// <summary>
    /// WinCloseButton.xaml 的交互逻辑
    /// </summary>
    public partial class WinCloseButton : Window
    {
        //捕获是调用close的关闭，还是关闭按钮的关闭
        public WinCloseButton()
        {
            InitializeComponent();
            this.SourceInitialized += new EventHandler(win_SourceInitialized);
        }

        private void win_SourceInitialized(object sender, EventArgs e)
        {
            win_SourceInitialized1(sender, e);
        }
        //第一种

        void win_SourceInitialized1(object sender, EventArgs e)

        {

            IntPtr handle = (new WindowInteropHelper(this)).EnsureHandle();
            HwndSource.FromHwnd(handle).AddHook(new HwndSourceHook(WndProc));

        }

        //第二种

        void win_SourceInitialized2(object sender, EventArgs e)

        {

            HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;
            if (hwndSource != null)
            {
                hwndSource.AddHook(new HwndSourceHook(WndProc));
            }

        }
        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            const int WM_SYSCOMMAND = 0x0112;
            const int SC_CLOSE = 0xF060;
            if (msg == WM_SYSCOMMAND && (int)wParam == SC_CLOSE)
            {

                Application.Current.Shutdown();
            }

            return IntPtr.Zero;
        }
    }
}