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 FiveWin and Windows API relationship                                        .
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 Object Oriented messages structure                                          .
 Windows API messages structure                                              .


 Windows API / FiveWin OOPS elements & messages equivalence:
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              Windows API                  FiveWin OOPS engine

      WindowProc( HWND hWnd,             oWnd:HandleEvent( ;
                  WORD wMessage,                           nMsg,
                  WORD wParam,                             nWParam,
                  LONG lParam )                            nLParam )

          Handle  hWnd                   Object oWnd   (oWnd:hWnd also)

          Numeric WM_MESSAGE             OOPS Message  oWnd:Message(...)

                      Returned values to Windows API

                    zero 0 - Message already processed
                  Non zero - Message already processed and
                             Windows API required value returned

                    Default Windows API behavior required
      return DefWindowProc( ... )        the Method just return nil