How to catch the ending resize window?

Question

I need catch the event endresize in WPF.

Answer 1

NO Timer Needed with very clean solution that have given by @Bohoo up, i just adapted his code from vb.net to c#

     public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();
                this.Loaded += MainWindow_Loaded;
            }

            private void MainWindow_Loaded(object sender, RoutedEventArgs e)
            {
                // this two line have to be exactly onload
                HwndSource source = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);
                source.AddHook(new HwndSourceHook(WndProc));
            }


            const int WM_SIZING = 0x214;
            const int WM_EXITSIZEMOVE = 0x232;
            private static bool WindowWasResized = false;


            private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
            {
                if (msg == WM_SIZING)
                {

                    if (WindowWasResized == false)
                    {

                        //    'indicate the the user is resizing and not moving the window
                        WindowWasResized = true;
                    }
                }

                if (msg == WM_EXITSIZEMOVE)
                {

                    // 'check that this is the end of resize and not move operation          
                    if (WindowWasResized == true)
                    {

                        // your stuff to do 
                        Console.WriteLine("End");

                        // 'set it back to false for the next resize/move
                        WindowWasResized = false;
                    }
                }

                return IntPtr.Zero;
            }

    }