Task:Process(): public: return true
  It is aplication loop which is finished only when the main program menu
  is active. The task switching is controled by task-swapper. For each
  window, which becomes active is the virtual method VProcess() activated.
  The creation of virtual method Process has the sense only for post
  initialisation of objects of user defined class. It is sufficient to
  run VPaint() (window content painting) and VProcess() (the task work).