/*virtual*/ BOOL CPreferencesDlg::CreateClient() {   if (!__super::CreateClient())      return(FALSE);    for (INT_PTR i = 0; i < m_arrButtons.GetSize(); ++i) {      CButton * const pButton = m_arrButtons.GetAt(i);      CString strButton;      pButton->GetWindowText(strButton);      const DWORD nID = ::GetWindowLong(pButton->GetSafeHwnd(), GWL_ID);             CButton * const pXTPButton = new CXTPButton();            if (!pXTPButton->Create(strButton, pButton->GetStyle(), CRect(0, 0, 0, 0), this, nID))      {         delete pXTPButton;         continue;      }       delete pButton;      m_arrButtons.SetAt(i, pXTPButton);       pXTPButton->SendMessage(WM_SETFONT, (WPARAM)(HFONT)m_fntNormal, FALSE);   }    SendMessageToDescendants(WM_XTP_SETCONTROLTHEME, xtpControlThemeResource, 0);      RecalcLayout();    return(TRUE);}

Please make some virtual methods so I can sabstitute CXTPButton.