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7-Zip FAQ

How can I add support for 7z archives to my application?

One way is to use the 7z.dll or 7za.dll (available from sf.net for download). The 7za.dll works via COM interfaces. It, however, doesn't use standard COM interfaces for creating objects. You can find a small example in "CPP\7zip\UI\Client7z" folder in the source code. A full example is 7-Zip itself, since 7-Zip works via this dll also. There are other applications that use 7za.dll such as WinRAR, PowerArchiver and others.

The other way is to call the command line version: 7za.exe.