WinRT XAML supports system-driven spell checking and auto-complete. Built in and right out of the box. The figure shows spell checking at work. Notice the squiggly underlining of the misspelled word, the options to correct or add to the dictionary or ignore.
You get both spell checking and autocompletion by setting just two properties on the TextBox.
<TextBox x:Name="JobTitle"
IsSpellCheckEnabled="True"
IsTextPredictionEnabled="True"
Width="200"
Height="40"
Grid.Row="2"
Grid.Column="1"
HorizontalAlignment="Left"
Margin="5"
VerticalAlignment="Center" />
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