Hi,
I’m learning how to build a new API, but I can’t find the function as listbox just like the picture below.

I already try Selectionmanager but it doesn’t work. And the below is my code that I can show the label and button.
from vcCommand import *
from vcApplication import *
cmd = getCommand()
aa = cmd.createProperty(VC_REAL, 'Name')
message = cmd.createProperty(VC_STRING, "Message")
company = cmd.createProperty(VC_REAL, 'Company')
sent_button = cmd.createProperty(VC_BUTTON, 'sent')
def OnStart():
sent_button.OnChanged = say_it
executeInActionPanel()
def say_it(arg):
hProp = getProperty('Name')
print('Hello %d' %(hProp.Value))
addState(None)
Would anyone be able to point me in the right direction on this?