changes:
- Many wxWidgets functions taking "const wxChar *" have been changed to take
- either "const wxString&" so that they accept both Unicode and ANSI strings.
- and the argument can't be NULL or "const char *" if the strings are always
- ANSI but may be NULL. This change is normally backwards compatible except:
+ either "const wxString&" (so that they accept both Unicode and ANSI strings;
+ the argument can't be NULL anymore in this case) or "const char *" (if the
+ strings are always; may still be NULL). This change is normally backwards
+ compatible except:
a) Virtual functions: derived classes versions must be modified to take
"const wxString&" as well to make sure that they continue to override the