Gerrit Telkamp

Ok, now I got it. Thank you!!!

Thank you Igor! Now I understand why I get all these callbacks. But I do not really understand what you mean with "Don't open real files for these callbacks". I would like to use the stream passed by the GetStream callback (UInt32 index, ISequentialOutStream outStream, ...) to read the content of the compressed file directly into the memory (using C7ZipOutStream). Is that not recommended? Thank you again

I'm using the CPP port of p7zip (newest version) and I want to extract a single file from a 7zip archive. The file is given by its index in the archive (UInt32 indexOfFile), so I have to call the archive->Extract method with only one index in the indices Array: IInArchive archive; [...] UInt32 indices[1]; indices[0] = indexOfFile; extractCallback = new ArchiveExtractCallback(...) archive->Extract( indices, (UInt32)1, false, extractCallback ); [...] I understand that the GetStream callback should...