A per-user alternative location for options files and some temporary files. Most applications should not set PrivateDir.

PrivateDir, if non-blank, must be unique for each concurrent user of the dtSearch Engine.  

The "PrivateDir" directory is designed as a per-user alternative to the HomeDir, which can be a shared network directory with a centralized set of read-only files. PrivateDir, if non-blank, must be unique for each concurrent user. Because of this, most applications should leave PrivateDir blank and should specify the full path and filename of options files. Options.TempFileDir can be used to control the location of temporary files.