-#if wxUSE_UNICODE
- wxPyCBH_callCallback(m_myInst, Py_BuildValue("(iiu)",row,col,val.c_str()));
-#else
- wxPyCBH_callCallback(m_myInst, Py_BuildValue("(iis)",row,col,val.c_str()));
-#endif
+ wxPyCBH_callCallback(m_myInst, Py_BuildValue("(iiO)",row,col,wx2PyString(val)));