Kevin,

The following snippet was contributed by Vlad Grynchyshyn (I think?) and shows how to hook the resize event of _Screen. Once you have this in place you could get an object reference to the toolbar and forward it the resize information.

DEFINE CLASS MyHook AS Custom
  oScreen = _Screen

  PROCEDURE oScreen.Resize && attach VFP code to object's event when this class initialized
    oScreen.MyContainer.ScreenResized
  ENDPROC
ENDDEFINE

_Screen.AddObject("oHook","MyHook") && now screen resize event captured...

HTH
Neil