- const wxChar *lineStart = str.begin();
- const wxChar * const end = str.end();
- for ( const wxChar *p = lineStart; p != end; p++ )
+ wxString::const_iterator lineStart = str.begin();
+ const wxString::const_iterator end = str.end();
+ for ( wxString::const_iterator p = lineStart + lenOld; p != end; p++ )