(Xlib) How to get the window created from ?

[cyrus lien]

Hi all,

I'm programming with xlib to check window "B" it was created from window
"A", how to get the information from window "B" to know that it was created
from window "A" ?
ex.How to check the pidgin conversation window to know that it was created
from pidgin buddy list window ?

Thanks !

Cyrus
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