+<P>There are also some ZIP archives that were encoded with methods unsupported by 7-Zip,\r
+for example, WAVPack (WinZip).</P>\r
+\r
+<H4>Why does drag-and-drop archive extraction from 7-Zip to Explorer use temp files?</H4>\r
+<P>7-Zip doesn't know folder path of drop target.\r
+Only Windows Explorer knows exact drop target.\r
+And Windows Explorer needs files (drag source) as decompressed files on disk.\r
+So 7-Zip extracts files from archive to temp folder and then \r
+7-Zip notifies Windows Explorer about paths of these temp files.\r
+Then Windows Explorer copies these files to drop target folder.</P>\r
+\r
+<P>To avoid temp file usage, you can use Extract command of 7-Zip or \r
+drag-and-drop from 7-Zip to 7-Zip.</P>\r
+\r
+<H4>Why doesn't the command line version add files without extensions to an archive?</H4>\r
+<P>You're probably using a *.* wildcard. 7-Zip doesn't use the operating system's wildcard mask parser, \r
+and consequently treats *.* as any file that has an extension. \r
+To process all files you must use the * wildcard instead or omit the wildcard altogether.</P>\r
+\r
+<H4>Why doesn't -r switch work as expected?</H4>\r
+<P>In most cases you don't need -r switch.\r
+7-Zip can compress subfolders even without -r switch.</P>\r
+<P>Example 1:</P>\r
+<PRE> 7z.exe a c:\a.7z "C:\Program Files"</PRE>\r
+<P>compresses "C:\Program Files" completely, including all subfolders.</P>\r
+<P>Example 2:</P>\r
+<PRE> 7z.exe a -r c:\a.7z "C:\Program Files"</PRE>\r
+<P>searches and compresses "Program Files" in all subfolders of C:\ (for example, in "C:\WINDOWS").</P>\r
+If you need to compress only files with some extension, you can use -r switch:\r
+<PRE> 7z a -r c:\a.zip c:\dir\*.txt </PRE>\r
+<P>compresses all *.txt files from folder c:\dir\ and all it's subfolders.</P>\r
+\r
+<H4>How can I store full path of file in archive?</H4>\r
+<P>7-Zip stores only relative paths of files (without drive letter prefix).\r
+You can change current folder to folder that is common for \r
+all files that you want to compress and then you can use relative paths:</P>\r
+<PRE>\r
+ cd /D C:\dir1\\r
+ 7z.exe a c:\a.7z file1.txt dir2\file2.txt\r
+</PRE>\r