>I just checked my Help and there are no such topics there.

I'm using the 7.0 help file, so it may be different in the Index tab.

> As I recall, I can not change TMPFILES variable in a code, only in config file...

That's right. You're wanting to do this on the fly? You could modify Sys(2019) and input the values you want (or do it in code with StrToFile()), but this would require a restart of VFP. It's a one time deal, though, so maybe this an acceptable solution?