SetArchiveOutputStream Method
The stream to write the zip, tar, jar, or gzip archive to.
procedure SetArchiveOutputStream(ArchiveStream: TStream);
Remarks
This method should be set when the archive is to be written to a stream when Compress is called.
By default, and when this is set to null, the component will write to the file specified by ArchiveFile. However, when this is a valid stream, the data will be written to the stream.