The VersionNum property indicates the internal format version number of the table. DBISAM assigns each table an internal format version number so that it can make sure that an application does not try to open a table using a different format than what DBISAM expects. The format version number changes whenever the internal format of the DBISAM tables change.
The following is a list of all of the version numbers returned by the VersionNum property:
You'll notice that the most current version of DBISAM does not always coincide with the latest table format version number.
This property does not require that the table be open in order to return a value. This allows the the property to be examined without opening the table.