- (BOOL) insertRecord: (NSInteger) recno blank: (BOOL) blankrecord;

The function appendRecord() adds a new record to the end of file.
If you pass "true", the record will be empty.
If you pass "false", the new record will contain information from internal memory.

    // copy record
    [dbf readRecord:10];
    [dbf insertRecord:11 blank:FALSE];
    // modify some values
    [dbf setField:0 asString:@"something" asDouble:12.34];
    [dbf insertRecord:12 blank:TRUE];
    // add empty record
    [dbf insertRecord:14 blank:TRUE];
    // your code