Description: Delphi used to extract the compressed program, personally think is the best format is very much supported. There are many online Dz7Zip, and known not 7z.dll that actually is based on this do, and Dz7Zip have a serious problem, the function after the completion of decompression, so the recursive algorithm, Dz7Zip to be invalid. I have been using sevenzip, feeling good, have not encountered any problems.
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File list (Check if you may need any files):
7z.dll
readme.htm
sevenzip.pas