diff --git a/Sample Applications/WPFGallery/Views/BasicInput/ComboBoxPage.xaml.cs b/Sample Applications/WPFGallery/Views/BasicInput/ComboBoxPage.xaml.cs
index d8aba374..a9cbaff5 100644
--- a/Sample Applications/WPFGallery/Views/BasicInput/ComboBoxPage.xaml.cs	
+++ b/Sample Applications/WPFGallery/Views/BasicInput/ComboBoxPage.xaml.cs	
@@ -1,7 +1,11 @@
-using System.Windows.Documents;
+using System.Windows;
+using System.Windows.Documents;
+using System.Windows.Media;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
 
+using Microsoft.Win32;
+
 using WPFGallery.ViewModels;
 
 namespace WPFGallery.Views;
@@ -19,5 +23,30 @@ public ComboBoxPage(ComboBoxPageViewModel viewModel)
     DataContext = this;
 
     InitializeComponent();
+
+    SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
+    this.Loaded += (s, e) => UpdatePageVisuals();
+}
+
+private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
+{
+    Dispatcher.Invoke(() =>
+    {
+        UpdatePageVisuals();
+    });
+}
+
+private void UpdatePageVisuals()
+{
+    // Fluent's HC selection color is WindowColor, washing out editable text selected on focus; use the Highlight color instead.
+    // Re-evaluated on theme changes so switching out of high contrast reverts to the theme default.
+    if (SystemParameters.HighContrast)
+    {
+        Resources["TextControlSelectionHighlightColor"] = new SolidColorBrush(SystemColors.HighlightColor);
+    }
+    else
+    {
+        Resources.Remove("TextControlSelectionHighlightColor");
+    }
 }
 }