I suspect it is rarely used if at all. Angus ps: Happy Easter to everone. ----- Original Message ----- From: "Russell Peters" <russellpeters@xxxxxxxxxxx> To: <delphizip@xxxxxxxxxxxxx> Sent: Sunday, 31 March 2002 8:22 Subject: [delphizip] Do the DLL's NEED to be reentrant? Does anyone actually use the re-entrant capability of the dll's. I very much doubt that ZipBuilder/ZipMaster would handle it. The only time I can think that it would be used is with multiple streams but I think it would slow down pretty much - zip/unzip is fairly cpu expensive. Just a thought - Russell Peters