long text

[conan]

Hello!
I coded
RFX_Text(pFX, _T("[Me_Title]"), m_Me_Title);.

then I can use untill 255 byte m_Me_Title.
But I want use more many character.
so I coded
RFX_Text(pFX, _T("[Me_Title]"), m_Me_Title,INT_MAX);.
then I meet error.
I coded that like msdn example.
What can I do.