// this shouldn't happen: wxFrame, wxMDIParentFrame and wxMDIChildFrame have m_wxwindow
wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid frame") );
// this shouldn't happen: wxFrame, wxMDIParentFrame and wxMDIChildFrame have m_wxwindow
wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid frame") );