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 FT_FUSE()
 Open or close a text file for use by the FT_F* functions
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 Syntax

      FT_FUSE( [ <cFile> ] [, <nMode> ] ) -> nHandle | NIL

 Arguments

     <cFile> is the text file you want to open.  If not specified,
     the file currently open, if any, will be closed.

     <nMode> is the open mode for the file.  Please refer to the
     discussion of open modes under FOPEN() in the Clipper manual
     and FILEIO.CH for a list of allowable open modes.  If not
     specified, the file will be opened with a mode of
     FO_READ + FO_SHARED (64).

 Returns

     If <cFile> is passed and the file is opened successfully, an
     integer containing the file handle.  If the file cannot be
     opened, -1 will be returned.

     If FT_FUSE() is called without any arguments, it will close the
     text file in the current "text area" and return NIL.

 Description

     The FT_F*() file functions are for reading text files, that is,
     files where each line (record) is delimited by a CRLF pair.

     Each file is opened in its own "workarea", similar to the concept
     use by dbf files.  As provided, a maximum of 10 files (in 10
     workareas) can be opened (assuming there are sufficient file
     handles available).  That number may be increased by modifying
     the #define TEXT_WORKAREAS in the C source code and recompiling.

 Examples

     FT_FUSE( "text.c" )      // open text file
     DO WHILE !FT_FEOF()
        ? FT_FREADLN()
        FT_FSKIP()
     ENDDO
     FT_FUSE()                // close file

 Source: FTTEXT.C

 Author: Brice de Ganahl and Steve Larsen