wpf window set window的owner

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  [DllImport("user32.dll")]  public static extern IntPtr GetAncestor(IntPtr hWnd, int flags);

 var dialog = new C1ImageDialog();             window = new Window();            window.Content = dialog;            window.ShowInTaskbar = false;            window.WindowStartupLocation = WindowStartupLocation.CenterOwner;            window.SizeToContent = SizeToContent.WidthAndHeight;            window.WindowStyle = WindowStyle.ToolWindow;            var elementSource = HwndSource.FromVisual(rtb) as HwndSource;            if (elementSource != null)            {                int GA_ROOT = 2;                IntPtr root = GetAncestor(elementSource.Handle, GA_ROOT);                new WindowInteropHelper(window).Owner = root;            }
注意：如果dialog裡面有事件需要註冊。。先註冊事件再

window.ShowDialog();
才有效果