Looping over all controls

[Ben Fisher]

Is there a convenient way to loop over all controls in a card or group?

I could keep a list of IDs, adding and deleting as necessary, but this
isn't so simple.

In the past I have used:

repeat with x = 1 to the number of btns in this cd
if there is a btn x then
--Do something with this btn
end if
end repeat

But it seems error-prone and not the best way.

-Ben