Hi i want to use listbox

hi,
can you please guide if we can use gui to display listbox like we have on parameters window., which we can activate with right click on screen , where we can select the values .
listbox should be on the display screen itself.
please guide

Currently supported (as of 6.25) are:

  • push buttons,
  • radio buttons,
  • checkboxes,
  • edit fields.

More controls will come in future versions.