void clearRecord(cdbfapiPlus* handle);
The function clearRecord() removes all data from internal memory and fills it with zeroes (0x00) or spaces (0x20).
You can call this function before calling setField(), setMemoBuf().
{
// your code
clearRecord(dbf);
setFieldString(dbf, 0, "some value");
setFieldDouble(dbf, 1, 123.45);
appendRecord(dbf, FALSE);
// your code
}