levelAttr.SetBulletNumber(1);
m_previewCtrl->BeginStyle(levelAttr);
m_previewCtrl->WriteText(wxString::Format(wxT("List level %d. "), i+1) + s_para2);
levelAttr.SetBulletNumber(1);
m_previewCtrl->BeginStyle(levelAttr);
m_previewCtrl->WriteText(wxString::Format(wxT("List level %d. "), i+1) + s_para2);