c# how do I get who created a word doc?

http://www.java2s.com/Tutorial/CSharp/0520__Windows/ModifyDocumentProperties.htm

I already have the document being passed in, isn't there a way to do it without making another instance of word?  This will take way too long.  Isn't there a way to get it from the doc?

please see this..

private void GetFileInformation(Document Doc)
        {
            object BuiltInProps;
 
            BuiltInProps = Doc.BuiltInDocumentProperties;
 
            Type TypeBuiltingProp = BuiltInProps.GetType();
 
            string Prop = "Author";
            string AuthorName;
            object AuthorProp = TypeBuiltingProp.InvokeMember("item", BindingFlags.Default | BindingFlags.GetProperty, null, BuiltInProps, new Object[] { Prop });
            Type TypeAuthorProp = AuthorProp.GetType();
 
            AuthorName = TypeAuthorProp.InvokeMember("Value", BindingFlags.Default | BindingFlags.GetProperty, null, AuthorProp, new Object[] { }).ToString();
 
            Console.WriteLine("{0}", AuthorName);
        }

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