C / C++ / MFC

// TextProgressCtrl.h
...
//    afx_msg LRESULT OnSetText(UINT, LPCTSTR szText);
//    afx_msg LRESULT OnGetText(UINT cchTextMax, LPTSTR szText);
    afx_msg LRESULT   OnSetText(WPARAM, LPARAM);
    afx_msg LRESULT   OnGetText(WPARAM, LPARAM);
 
// TextProgressCtrl.cpp
...
LRESULT CTextProgressCtrl::OnSetText(WPARAM, LPARAM lParam)
{
    LPCTSTR szText=(LPCTSTR)lParam;
    LRESULT result = Default();
 
    if ( (!szText && m_strText.GetLength()) ||
         (szText && (m_strText != szText))   )
    {
        m_strText = szText;
        Invalidate();
    }
 
    return result;
}
 
LRESULT CTextProgressCtrl::OnGetText(WPARAM cchTextMax, LPARAM lParam)
{
    LPTSTR szText=(LPTSTR)lParam;
 
    if (!_tcsncpy(szText, m_strText, cchTextMax))
        return 0;
    else 
        return min(cchTextMax, (UINT) m_strText.GetLength());
}

#pragma comment(lib, "Ws2_32.lib.lib")

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