Directory to use for temporary files.

Use tempFileDir to control the location of most temporary files that the dtSearch Engine creates, such as temporary files used for large file conversion operations or extraction of large documents stored in containers. 

IndexJob.TempFileDir will still control the location of temporary lists and sort buffers created during indexing. 

For more information, see "The HomeDir, PrivateDir, and TempFileDir option settings" in the dtSearch Engine API Reference (dtSearchApiRef.chm).