This example will wait until text in the defined target area has changed.
Sub Main
Dim Sys as Object, Sess as Object
Set Sys = CreateObject("Extra.System")
'assumes an open session.....
Set Sess = Sys.ActiveSession
Dim Area as Object
Set Area = Sess.Screen.Area(1,1,5,10)
ret = Area.WaitUntilChanged()
If ret Then
Msgbox "Text in target area changed before timeout occurred!"
Else
Msgbox "Text in target area did not change before timeout occurred!"
End If
End Sub