are all controls loaded?

[Slava Paperno]

The openCard handler in the first card of my stack sends messages to various
controls on the card, and I think some of these messages are sent before the
control is fully loaded: I see error "no such object." If I use "send XXX to
YYY in 800 milliseconds," then all is well.

How do I solve this dilemma? I need something like an
"afterAllControlsAreLoaded" message :)

Slava