[Watsup-users] How to identify window uniquely?

[Dew D. <mid...@ya...>]

Hello,
I am a new user of  watsup and I am trying to learn it.At first ,I want to know how can I uniquely identify each window.Sometimes we have consecutive different windows with same title.Now findTopWindow(wantedText="xxx") is not enough in this case. So I have to use ;selectionFunction' along with 'wantedText' argument.But   selectionFunction is not clear to me.Can anybody please give me one simple example of using selection function?And also can anybody please tell me..how can I use window title along with window text or static control to uniquely identify  each window..?