Box:Paint(IsTop,lDouble): public: return true
  Window is painted on the screen. Warning! the background is not saved.

  Parameter description:
  ~~~~~~~~~~~~~~~~~~~~~
  IsTop: logical: default is true.
   If true, the window title is painted in nTitle color (look at Commands
    .. Constants); if false the title is painted in inside window character
    colors (nNormal).

  lDouble: logical: default is IsTop.
   If true window frame is double lined, if false it's single lined.