The following table shows the features supported by each DLL from the 7-zip source code.

Compression Extraction Archive Encryption Header Encryption Archive Decryption
7z.dll :heavy_check_mark: :heavy_check_mark: :heavy_check_mark:¹ :heavy_check_mark:² :heavy_check_mark:³
7za.dll² :heavy_check_mark: :heavy_check_mark: :heavy_check_mark: :heavy_check_mark: :heavy_check_mark:
7zra.dll² :heavy_check_mark: :heavy_check_mark: :x: :x: :x:
7zxa.dll² :x: :heavy_check_mark: :x: :x: :heavy_check_mark:
7zxr.dll² :x: :heavy_check_mark: :x: :x: :x:

1 Only 7z and zip formats.
2 Only 7z format.
3 Only 7z, zip and rar formats.

How to build the DLLs

TODO






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