Gets the total number of characters that are available for rendering within the current element.
HRESULT getNumberOfChars( long *pResult );
- [out, retval] The total number of characters.
Returns S_OK if successful, or an error value otherwise.
The total number of characters includes referenced characters from
trefreference, regardless of whether they are rendered.
The total number of characters is effectively equivalent to the length of the IHTMLDOMNode3::textContent attribute from the DOM Level 3 Core specification (section 1.4), if that attribute also expands