This confirmation routine is called by the parsing framework when it's logic determines the cursor is over a tag. It gives the parser a chance to override the default cursor-tag rollover matching. This is not necessary if the default behaviour is acceptable. It is called from the CRichText::CursorOverTag() when the framework tests for format redraw when over a tag and CRichText::OverrideFormatForParsersIfApplicable() when Tagma is formatting text.