content: ' sub init()
  '   m.ButtonGroup = m.top.findNode("ButtonGroup")
  '   m.ButtonGroup.setFocus(true)
  '   m.top.ObserveField("focusedChild","onChildFocused")
  '   'm.ButtonGroup.observeField("buttonSelected","onButtonSelected")
  ' end sub
  
  ' function onChildFocused()
  '   if not m.ButtonGroup.IsInFocusChain() then
  '     m.ButtonGroup.setFocus(true)
  '   end if
  ' end function
  
  ' sub onButtonSelected()
  '   if m.ButtonGroup.buttonSelected = 0
  '     print m.ButtonGroup.focusedChild.id
  '   end if
  '   if m.ButtonGroup.buttonSelected = 1
  '     print m.ButtonGroup.focusedChild.id
  '   end if
  ' end sub