duilib之重写BUTTON按钮

LPCTSTR GetClass() const;
LPVOID GetInterface(LPCTSTR pstrName);
virtual void SetAttribute( LPCTSTR pstrName, LPCTSTR pstrValue );
int GetMyAttr();
void SetMyAttr(int nData);

    CMyButtonUI::CMyButtonUI(void)
    {
    }


    CMyButtonUI::~CMyButtonUI(void)
    {
    }

    LPCTSTR CMyButtonUI::GetClass() const
    {
        return _T("IRButtonUI");
    }

    LPVOID CMyButtonUI::GetInterface( LPCTSTR pstrName )
    {
        if( _tcscmp(pstrName, _T("MyButton")) == 0 ) return static_cast<CMyButtonUI*>(this);
        return CButtonUI::GetInterface(pstrName);
    }

    void CMyButtonUI::SetAttribute( LPCTSTR pstrName, LPCTSTR pstrValue )
    {
        //throw std::exception("The method or operation is not implemented.");
        if( _tcscmp(pstrName, _T("my_attr")) == 0 )
        {
            LPTSTR pstr = NULL;
            m_nMyAttr = _tcstol(pstrValue, &pstr, 10);
        }
        CButtonUI::SetAttribute(pstrName, pstrValue);
    }

    int CMyButtonUI::GetMyAttr()
    {
        return m_nMyAttr ;
    }

    void CMyButtonUI::SetMyAttr(int nData)
    {
        m_nMyAttr  = nData;
    }

< MyBurtton my_attr="100" bkcolor="#FF874523" height="30" width="30" />

if(0 == _tcsicmp(pstrClass,_T("MyBurtton")))
        return newCMyButtonUI();
 return NULL;