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   LOOKFLD()       Do a locate on any field in the database
     Usage         LOOKFLD(<field array>,<field descr array>)
     Param         <field array>        - array of fields
                   <field descr array>  - array of field descriptions
                   (both optional)

     Notes         RECORD POINTER IS LEFT ON NEW RECORD IF FOUND
                   lookfld() pops up a window of the fields, and then
                   asks for a <range of> value(s) to search for.
                   If a LOCATE is successful, the next call to
                   lookfld() will do a CONTINUE.
                   Arrays of FIELDS and FIELD DESCRIPTION may be sent
                   as params, and the selection is then limited to
                   the fields in these arrays
                   The variable lf_cont_  is made public.
                   Best description: open a DBF and call LOOKFLD()