SpellCheck Class (System.Windows.Controls)

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

  <StackPanel>
    <TextBox SpellCheck.IsEnabled="True" Name="myTextBox"></TextBox>
  </StackPanel>

</Page>

Imports System
Imports System.Windows
Imports System.Windows.Controls

Namespace SDKSample
	Partial Public Class SpellCheckExample
		Inherits Page
		Public Sub New()
			Dim myStackPanel As New StackPanel()

			'Create TextBox
			Dim myTextBox As New TextBox()
			myTextBox.Width = 200

			' Enable spellchecking on the TextBox.
			myTextBox.SpellCheck.IsEnabled = True

			' Alternatively, the SetIsEnabled method could be used
			' to enable or disable spell checking like this:
			' SpellCheck.SetIsEnabled(myTextBox, True)

			myStackPanel.Children.Add(myTextBox)
			Me.Content = myStackPanel
		End Sub
	End Class
End Namespace

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

namespace SDKSample
{
    public partial class SpellCheckExample : Page
    {
        public SpellCheckExample()
        {
            StackPanel myStackPanel = new StackPanel();

            //Create TextBox
            TextBox myTextBox = new TextBox();
            myTextBox.Width = 200;

            // Enable spellchecking on the TextBox.
            myTextBox.SpellCheck.IsEnabled = true;

            // Alternatively, the SetIsEnabled method could be used
            // to enable or disable spell checking like this:
            // SpellCheck.SetIsEnabled(myTextBox, true);

            myStackPanel.Children.Add(myTextBox);
            this.Content = myStackPanel;
        }
    }
}