>Is there a sigificant byte in a record in the DBF that marks the start or end of a records. Or is it just a calcluation of records lengths to find out where the next record strarts.

No significant bytes mark start and end. Calculation as you said.
Recsize() is in header at offset 10-11. It includes one byte delete flag. Also in header at offset 8-9 there is position of first record.
Cetin