On Windows 7 and above it will usually be found in "C:\Program Files (x86)\<OpenOffice.org
folder>\program\soffice.exe".
NOTE: In Microsoft Windows, OODocBatchConverter
will start OpenOffice in its "headless" state. That is, OpenOffice will
not display its usual user interface and will be invisible. There is no
need for the interface because OODocBatchConverter will communicate directly with Openffice. When you exit OODocBatchConverter, it will also terminate the invisible OpenOffice process.