JvJCLUtils
  add function RectIsSquare  // copy for JclGraphUtils
  add procedure RectNormalize // copy for JclGraphUtils
  add function RectSquare

JvJVCLUtils
  Rewrite procedure DrawArrow ,add al param Margin ,Added a same name DrawArrow overload,
   Thus you can draw arrow by Point + Size now, not just only by rect.
 