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Compare Files Function
File Operations Class

Public Function CompareFiles( _
      ByVal vFileOne As Variant _
    , ByVal vFileTwo As Variant _
    ) As Variant

Compare two files to determine if they have the same contents.
Return 0 if they are the same,
Return 1 if they are different.
Return -1 in case of most errors.

Return value: 
     1: File sizes differ OR file contents differ.
     0: File sizes AND file contents are the same.
    -1: There were errors accessing one or both files.
Examples: 
    ' Assumes C:\COMMAND.COM and C:\AUTOEXEC.BAT both exist
    ' and that they have different contents.
    CompareFiles("C:\COMMAND.COM", "C:\COMMAND.COM") = 0
    CompareFiles("C:\COMMAND.COM", "C:\AUTOEXEC.BAT") = 1
    ' #3 assumes C:\TEMP is a directory or an unused file name.
    CompareFiles("C:\COMMAND.COM", "C:\TEMP") = -1 ' #3
See also: 
    Comparisons Class
    StrComp Function (Visual Basic)
vFileOne: Name of the first of two files whose contents will be compared. Function returns Null if vFileOne is Null or cannot be fixed-up to a string.

vFileTwo: Name of the seconds of two files whose contents will be compared. Function returns Null if vFileTwo is Null or cannot be fixed-up to a string.

Note: The file dates and attributes may differ, but as long as the two files have the same size and contents then they will be considered the same by this function.

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