WPF 使用SetParent嵌套窗口

有点类似与Winform的MDI窗口。

使用函数为SetParent和MoveWindow（经常配合）。

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

        [DllImport("user32.dll", EntryPoint = "SetParent")]
        public static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

给个小例子，例如嵌套TIM的聊天窗口

其中window1 就是新建的窗口里面什么都没有写，默认

public partial class MainWindow : Window
    {
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

        [DllImport("user32.dll", EntryPoint = "SetParent")]
        public static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

        [DllImport("User32.dll", EntryPoint = "FindWindow")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32", EntryPoint = "GetDesktopWindow")]
        public static extern IntPtr IntPtrGetDesktopWindow();

        public MainWindow()
        {
            InitializeComponent();
          
        }
        int baseSize =700;
        bool IsOpen = false;
        int Num = 1;
        Window1 window;
        private void MainWindow_Closed(object sender, EventArgs e)
        {
           // var childhwnd = FindWindow("TXGuiFoundation", "唐大人的 iPhone");
            var d = SetParent(childhwnd, IntPtrGetDesktopWindow());
            MoveWindow(childhwnd, 0, 0, baseSize + Num+10, baseSize + Num+10, true);
        }
        IntPtr childhwnd;
        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            IntPtr hwnd = new WindowInteropHelper(window).Handle;
             childhwnd = FindWindow("TXGuiFoundation", "唐大人的 iPhone");
                //(IntPtr)Convert.ToInt32("000307BA", 16);
            var d = SetParent(childhwnd, hwnd);
            MoveWindow(childhwnd, 0, 0, 600, 600, true);
        }
       
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (!IsOpen)
            {
                window = new Window1();
                window.Loaded += MainWindow_Loaded;
                window.Closed += MainWindow_Closed;
                window.Show();
                IsOpen = true;
                Num++;
                return;
            }
            Num++;
            window.Close();
            IsOpen = false;
        }

        
    }