-Page:NewUpdateMechanism

form literals before the update macro is called:
literals: %=literals=%
(should be set the after you post the form)

webdropdown1 properties before the update macro is called:
value: %=webdropdown1.value=%
text: %=webdropdown1.text=%

updating...
%=webdropdown1.update=% (will update the component and remove the literal)

form literals after the update macro is called:
literals: %=literals=%
(should be clear here after you posted the form)

webdropdown1 properties after the update macro was called:
value: %=webdropdown1.value=%
text: %=webdropdown1.text=%

here's the dropdown:
%=webdropdown1.execute=%


here's the component we used to make this demo:
object WebDropDown1: TWebDropDown
  tpOptions = [tpUpdateOnLoad, tpUpdateOnGet, tpStatusPanel]
  StatusBar = tpStatusBar1
  WebIni = fmhtWebApp.WebIniLink
  WebApp = fmhtWebApp.WebApp
  DirectCallOk = False
  List.Strings = (
    '1=one'
    '2=two'
    '3=three'
    '4=four')
  DefaultValue = ddBlank
  Left = 16
  Top = 64
end