function Backup(const BackupName: String; const
      BackupDescription: String; Compression: Byte; BackupTables:
      TStrings): Boolean

Usage

Call the Backup method to backup all tables specified by the BackupTables parameter into the backup file specified by the BackupName parameter. You can specify a description for the backup with the BackupDescription parameter. The Compression parameter is specified as a Byte value between 0 and 9, with the default being 0, or none, and 6 being the best selection for size/speed. The default compression is ZLib, but can be replaced by using the TDBISAMEngine events for specifying a different type of compression. Please see the Compression and Customizing the Engine topics for more information.

The Backup method cannot be run when a transaction is currently active for the database. You can inspect the InTransaction property to determine if a transaction is currently active for the database. When the backup executes, it obtains a read lock for the entire database that prevents any sessions from performing any writes to any of the tables in the database until the backup completes.