Returns a TextRange object covering any misspelled word at a specified position in the contents of the RichTextBox.
public TextRange GetSpellingErrorRange(
A TextPointer that specifies a position and logical direction that resolves to a character to examine for a spelling error. Use the LogicalDirection property of this TextPointer to specify the direction of the character to examine.
A TextPointer like position usually specifies a position between two characters. Use the LogicalDirection property of position to specify which character to examine.