**Their values should be displayed and changed with keyboard operation. *parameters and functions value - - bErase true or not RefreshRect rect back ground mairgin rect a small band rect ... fonts ... SetPixel poisson SetPixel wave ****** …

********* * region - - background a small band for the wave graph a small rect only (spacified part)) objects rectangle as cursol a small rect only (spacified part) *** region - - background poisson disk sampling whole window (the entire r…

* - objects invalidate area keyup animation - 1 2 3 rect15, rect 17 rect 17(on a little band) (v) (v) 4 rect15, rect 17 rect 17(on a little band)- (-) (v) - * All cases with cursol invalidated area will be a on a band area. *invalidate cur…

We paint the objects with begin paint and end paint. Once, invalidate even a small cursol, all objects will be disapeared. We can draw the wave cursol as like, * - paint (drawing) keyup ani-thread keyup thread - 1 rect 15 (v) (-) no no ani…