Gets or sets a value specifying whether there is a complete frame around the text. If text is selected, the property specifies this attribute for the whole selected text.
public bool BoxFrame { get; set; }
Public Property BoxFrame() Boolean
The following XAML example shows how to bind the Box
<MenuItem
IsCheckable="True"
Header="Box Frame"
IsChecked="{Binding ElementName=textControl1, Path=InputFormat.BoxFrame}" />