fpkey_delete()

Function fpkey_delete is used to delete an index key value.

The syntax for fpkey_delete is as follows:

fpkey_delete(int file_id, int index, char *keyval_found, int *recno)

    int file_id         - File unit of open file from previous 
                          fpfile_open function.
    
    int index           - Index number to search on.

    char *keyval_found  - Value of original "old" key to be changed.

    int *recno          - Record address from a previous get/lock operation.

The possible values for fperrno and an explanation of each value follow.

     Value            Explanation
     --------------------------------------------------
     FEROK  - Code  0: Successful FASTPLUS Operation 
     FERACC - Code  2: Illegal access rights
     FEROPN - Code  5: FAST file does not exist
     FERUNT - Code  6: Illegal FAST file id
     FERLEN - Code  7: Illegal record length
     FERFHE - Code  9: System file error
     FERIND - Code 10: Illegal index number
     FEREXT - Code 12: Record not found