List of Windows NT/2000 files and what they do

[May, Jason S]

Does anyone know of a list of files for Windows NT/2000 that show what each
file does or what application it is related to.  For example: I have a list
of several .DLL files and I want to find out what applications they belong
to.  I also have several .exe files in that list, I need to know what they
do also.  Thanks