restart:
with(Maplets):
with(Maplets[Elements]):
M:=Maplet(
 Window(title="Maplet Elements",
  layout=BoxLayout(
   BoxColumn(border=true,
    BoxRow(
     BoxCell(halign=left,
      "ComboBox"
     ),
     BoxCell(halign=right,
      ComboBox[CB]("one",["one","two","three"],
       onchange=SetOption(target='TF', Argument('CB')))
     )
    ),
    BoxRow(
     BoxCell(halign=left,
      "ComboBox editable"
     ),
     BoxCell(halign=right,
      CheckBox[ChB](true,
       onchange=SetOption(target='CB', `option`=editable, Argument('ChB')))
     )
    ),
    BoxRow(
     BoxCell(halign=left,
      "DropDownBox"
     ),
     BoxCell(halign=right,
      DropDownBox[DDB]("one",["one","two","three"],
       onchange=SetOption(target='TF', Argument('DDB')))
     )
    ),
    BoxRow(
     BoxCell(halign=left,
      "ListBox"
     ),
     BoxCell(halign=right,
      ListBox[LB]("one",["one","two","three"],
       onchange=SetOption(target='TF', Argument('LB')))
     )
    ),
    BoxRow(border=true,
     BoxCell(
      "Result"
     ),
     BoxCell(
       TextField[TF](10)
     ),
     BoxCell(
      Button("Close",Shutdown())
     )
    )
   )
  )
 )
):
Display(M);