Today someone showed this cool little feature in the Find/Replace dialog of the Rich Edit Control
You can search for any string or you can build a complex regular expression to match a specific pattern. This Find/Replace feature is also available via Document API
DocumentRange[] FindAll(Regex regex);
DocumentRange[] FindAll(Regex regex, DocumentRange range);
int ReplaceAll(Regex regex, string replaceWith);
int ReplaceAll(Regex regex, string replaceWith, DocumentRange range);
Pretty cool ah?
Azret