>Christian,
>
>>>I was just looking at the chilkat libraries, because I need a solution for unzip function. I used VFPCompression.fll, but at one client we cannot make this work, so I am looking at alternatives.
>
>Not your question, but: the usual cause of vfpcompression.fll not working is a missing dll dependency. As I recall, some of Craig Boyd's flls have multiple versions compiled in different VC++ versions with different dependencies. Some versions of Windows have most or all of the dependencies by default; others don't. So if you already have code using VFPcompression, the most efficient response could be simply to include the dependencies in the app folder. Sorry if you already do this, but otherwise: if you go for the VC++7 flls, try distributing msvcp71.dll, msvcr70.dll and msvcr71.dll with your apps. I think msvcp71.dll is the one most often missing for at least one of Craig's flls. This used to be covered in detail at his sweetpotatosoftware.com website; perhaps somebody else here secured details before the site went offline.

Indeed this was the first thing that I checked, but both files are in syswow64. Also the library itself does not give an error, the unzip process itself returns .F.
It would be interesting to look into the reason for the failure, not sure if I can get the exact error from VFPCompression. The folder to which it extracts would be a subfolder in C:\Users\-username-\AppData\local\-appname- and that always works. They do have some interesting setup, not exactly sure if it's Citrix, but I saw that in the Users folder are hundreds of users.