Window:Drag(lCanSize): public: return true
  It enables the interactive window moving and resizing. With use of the
  cursor arrows is the window moved, with the cursor arrows on the numeric
  keypad with NUM-LOCK on is the window resized.

  Parameter description:
  ~~~~~~~~~~~~~~~~~~~~~~
  lCanSize: logical: default is not Window:Minimize.
   If the lCanSize is true, the window can be resized, otherwise it can be
   only moved. (minimized window can be only moved)