No, it fires before you set any values. You need to keep the window hidden (visible = false) until you set the values and Show it.
@Tim Hare,
Thanks Tim.
The window(s) are set visible = false initially (and implicitinstance = false as well).
I believe that my window refreshing issue was due to a thread timer I forgot was automatically running from having its mode set to multiple in the IDE.
Damn.