Here is the format:- for DBase 3 DBF Sturctures

 1. Header of a dbf file.

 typedef struct
 {
       char dbf_id;
       char last_update[3];
       long last_rec;
       unsigned data_offset;
       unsigned rec_size;
       char filler[20];
 }

 2. Followed by field information.
     typedef struct
     {
          char field_name[11];
          char field_type;
          union
          {
             unsigned char_len;
             struct
             {
                 char len;
                 char dec;
             } num_size;
           }len_info;
           char filter_[14];
     } field_rec;