In order to better understand the file-based communication scheme used by the WinHTTPD cgi-win interface, I wrote a simple cgi-win program which can help clarify this crucial interface. The URL is http://piper.princeton.edu/cgi-win/web_back.exe. When a Web client accesses this URL with or without submitting form data to it, the WEB_BACK.EXE program returns a listing of all of the interesting stuff that it got from the WinHTTPD server. Read Bob Denny's excellent documentation on the WinHTTPD server and play with my little WEB_BACK.EXE program in order to understand how the cgi-win interface works.