File Management
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 Reference Item| Description
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 ADIR()        | Fill a series of arrays with directory information
 CLOSE         | Close a specific set of files
 COPY FILE     | Copy a file to a new file
 CURDIR()      | Return the current DOS directory
 DELETE FILE   | Remove a file from disk
 DIR           | Display a listing of files from a specified path
 DIRECTORY()   | Create an array of directory and file information
 DISKSPACE()   | Return the space available on a specified disk
 ERASE         | Remove a file from disk
 FILE()        | Determine if files exist in the default directory or path
 FRENAME()     | Change the name of a file
 RENAME        | Change the name of a file
 SET ALTERNATE | Echo console output to a text file
 SET DEFAULT   | Set the CA-Clipper default drive and directory
 SET PATH      | Specify the CA-Clipper search path for opening files
 TYPE          | Display the contents of a text file
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