buffer.h - 'StrCopy' was not declared in this scop

In file included from ..\..\include/wx/strconv.h:18:0,
                 from ..\..\include/wx/strvararg.h:21,
                 from ..\..\include/wx/string.h:53,
                 from ..\..\include/wx/memory.h:16,
                 from ..\..\include/wx/object.h:20,
                 from ..\..\include/wx/utils.h:19,
                 from ..\..\include/wx/vector.h:31,
                 from ../../src/stc/scintilla/src/Selection.h:134,
                 from ../../src/stc/scintilla/src/Editor.cxx:41:
..\..\include/wx/buffer.h: In instantiation of 'wxCharTypeBuffer<T>::wxCharTypeB
uffer(const CharType*, size_t) [with T = char; wxCharTypeBuffer<T>::CharType = c
har; size_t = unsigned int]':
..\..\include/wx/buffer.h:358:72:   required from here
..\..\include/wx/buffer.h:263:44: error: 'StrCopy' was not declared in this scop
e, and no declarations were found by argument-dependent lookup at the point of i
nstantiation [-fpermissive]
             this->m_data = new Data(StrCopy(str, len), len);
                                     ~~~~~~~^~~~~~~~~~

buffer.h

    wxCharTypeBuffer(const CharType *str = NULL, size_t len = wxNO_LEN)
    {
        if ( str )
        {
            if ( len == wxNO_LEN )
                len = wxStrlen(str);
            this->m_data = new Data(this->StrCopy(str, len), len);
        }
        else
        {
            this->m_data = this->GetNullData();
        }
    }