True if grammatical errors are marked by a wavy green line in the specified document. Read/write Boolean.
Note To view grammatical errors in your document, you must set the CheckGrammarAsYouType property to True.
Example
This example sets Word to check for grammatical errors as you type and to display any errors found in the active document.
Options.CheckGrammarAsYouType = True
ActiveDocument.ShowGrammaticalErrors = True