Icon click event

[behrooz shafiee <shafiee01 gmail com>]

Hello all,
currently i am trying to develop a persian calender gnome-extension but due to lack of any kind of documentation its really difficult and i just try to understand existing samples.
i have an icon:
let Icon = new St.Icon(icon_prop);
and i want to bind on it a clicked or button-release-event, like a button!
i dont know if it's possible or not!!
i tried something like this but doesnt work:
Icon.connect('button-release-event', Lang.bind(this, _function));

thx

--
Behroozzz