I'm writing my next/prevField handler for a complex form which may have some
of its fields hidden (non-usable) depending on the other controls. My code
currently has a list of field IDs set in the "tab order", but when I want to
go to the next/prev field, I don't want to set the focus on a non-usable
control. Is there a better way to find out that a field is usable than
directly checking its attr.usable bit? You can set this bit using
FldSetUsable(), but I wasn't able to find the inverse function.
BTW, this is also a problem for lists -- I cannot find a function to affect
the usable bit of a non-popup list. I wanted a list that would hold query
results to only appear once the query had been completed.
Thanks!
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