如何在Visual studio中使TwinCAT3可以使用word文本选择突出显示，如"Word突出显示与页边距“

<UserControl x:Class="CustomEditor.CustomTextEditor"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="400">
    <Grid>
        <TextBox x:Name="textEditor" SelectionChanged="TextEditor_SelectionChanged" />
    </Grid>
</UserControl>

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace CustomEditor
{
    public partial class CustomTextEditor : UserControl
    {
        public CustomTextEditor()
        {
            InitializeComponent();
        }

        private void TextEditor_SelectionChanged(object sender, RoutedEventArgs e)
        {
            var textBox = sender as TextBox;
            if (textBox != null)
            {
                HighlightSelection(textBox);
            }
        }

        private void HighlightSelection(TextBox textBox)
        {
            var selectionStart = textBox.SelectionStart;
            var selectionLength = textBox.SelectionLength;

            if (selectionLength > 0)
            {
                var textRange = new TextRange(textBox.SelectionStart, textBox.SelectionStart + selectionLength);
                textRange.ApplyPropertyValue(TextElement.BackgroundProperty, Brushes.Yellow);
            }
        }
    }
}