[This is preliminary documentation and subject to change]
As an advanced use of the redirect method, you can redirect all requests for files in a particular directory to a program. Generally, you also want to pass any parameters from the original URL to the program, which you can do by using redirect variables.
For example, to redirect all requests for scripts in a Scripts directory to a logging program that records the requested URL and any parameters passed with the URL, type /Scripts/Logger.exe?URL=$V+PARAMS=$P. $V and $P are redirect variables.
For more information on redirect variables, see Redirect Reference.