The function set_form_opts sets all the given form's option bits
(form option bits may be logically-OR'ed together).
The function form_opts_on turns on the given option bits, and leaves
The function form_opts_off turns off the given option bits, and
leaves others alone.
The function form_opts returns the form's current option bits.
The following options are defined (all are on by default):
Overload the REQ_NEW_LINE forms driver request so that calling
it at the end of a field goes to the next field.
Overload the REQ_DEL_PREV forms driver request so that calling
it at the beginning of a field goes to the previous field.
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