C#WPF调用Halcon在picturebox中加载图片，控件不固定在窗体中

我创建一个WPF程序，打算模仿一个winform调用halcon的示例，通过picturebox控件显示图片。

这是wpf的程序，加载了winform的库，添加一个picturebox控件

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:wfi="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
        xmlns:local="clr-namespace:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <wfi:WindowsFormsHost x:Name="pictureBox" Width="200" Height="200" Margin="10,10"/>
    </Grid>
</Window>

这是C#代码，根据示例抄了一遍，主要就是一个简单的读取图片然后显示图片

public partial class MainWindow : Window
    {
        private HTuple MainUI_Camera_WindowID;
        public HObject RawImage = new HObject();
        public MainWindow()
        {
            InitializeComponent();
            OpenWindow();
            LoadImage();
        }

        public void OpenWindow()
        {
            long m_lWindowRow = 0;
            long m_lWindowColumn = 0;
            HTuple Farther_windowHandle = this.pictureBox.Handle;
            HOperatorSet.SetWindowAttr("background_color", "blue");
            HOperatorSet.OpenWindow(m_lWindowRow, m_lWindowColumn, (HTuple)this.pictureBox.Width, (HTuple)this.pictureBox.Height,
                Farther_windowHandle, "visible", "", out MainUI_Camera_WindowID);
        }

        public void LoadImage()
        {
            HOperatorSet.ReadImage(out RawImage, @"..\..\Image\01.bmp");
            HTuple width = null;
            HTuple height = null;
            HOperatorSet.GetImageSize(RawImage, out width, out height);
            HOperatorSet.SetColor(MainUI_Camera_WindowID, "yellow");
            HOperatorSet.SetPart(MainUI_Camera_WindowID, 0, 0, height, width);
            HOperatorSet.DispObj(RawImage, MainUI_Camera_WindowID);
            HOperatorSet.SetTposition(MainUI_Camera_WindowID, width / 2, height / 2);
            HOperatorSet.WriteString(MainUI_Camera_WindowID, "HelloWorld");
        }


    }

可是运行的时候，在winform下运行正常，控件在窗体中不会移动，但是在wpf下运行的时候，控件直接飞出了窗体，能随意拖动，请问这是为什么

img