 131-132:  VK_END -> fMax  VK_HOME -> fMin
* END    ,    !

- PaintKnob:   ( Control.Transparent:=true;  Init)
*Transparent    , -       

 . - _work_MinValue  _work_doMinValue     Max
*       

 -   PageSize
*    :)

  Class=Edit ( ini)
*     - ,  -  Custom