This function returns an array of file variable names
for a given file.
the_file  : file
- A reference to a file that was added with the
This function returns an array of strings with each element
containing the name of a file variable. The length of this
array is equal to the number of variables in the file.
This function is useful when accessing file variables by string name.
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$Revision: 1.7 $ $Date: 1998/06/15 21:29:38 $