In wxWiki i found this page http://wiki.wxwidgets.org/Converting_everything_to_and_from_wxString. It describes how to convert int to wxString, but doesn’t describe how to convert long int into wxString.
After compilation application works, but compiler throws this warning twice (I convert long int to wxString twice):
[Warning] int format, long int arg (arg 3)
Conversion from long to wxString:
Conversion from long long: