A String value specifying the file name and path to a UserControl file that is a customized Spelling Options dialog form.
At design time, you can use the SpellCheckOptionsFormPath property's editor to simplify selecting a UserControl file within your web project. To invoke the property editor, click the corresponding ellipsis button.
Use this property and any other SpellCheckerFormsSettings property to refer to customized versions of built-in dialog forms. You can re-use the same dialog form throughout all ASPxSpellChecker controls used in your project by assigning the same form path to any SpellCheckOptionsFormPath property.