The GetFileSize function retrieves the uncompressed size of a file. Use the GetCompressedFileSize function to obtain the compressed size of a file.http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/getfilesize.asphttp://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/getcompressedfilesize.asp
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