KB-CONFIRM
==========
syntax: (kb-confirm <babylon-format-string>
{<babylon-format-arg> ...})
This function produces a confirmation-dialogue in an
own window. You can choose between yes and no.
If you confirm then T will be returned, otherwise NIL.
example: >(ask [city _x]
(kb-confirm "Would you like to
visit ~A ?"
(name-of _x)))
Would you like to visit New-York ?