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 DATABASE/FILE CONTROL

 The Database/File Control functions include features for locking a
 database from being opened by a Clipper program or by dBASE,
 determining if a file is a database and if it has a memo file,
 checking the maximum file handles allowed and setting them, and
 allowing a database to be opened without a memo file to save a file
 handle.

 C_SECURE()               C_ISDBT()
 C_CLOSEDBF()             C_SETDBT()
 C_CLOSEAREA()            C_FLDINFO()
 C_ISOPEN()               C_HANDLES()
 C_FTOMACRO()             C_SETHANDLES()
 C_UNIQUEKEY()            C_MAXHANDLES()
 C_ISDBF()