HTTP (web pages) cannot run executables like you can run them in Windows. Web servers only respond to requests for pages, then dish the right pages out. There are web services and applications that can do almost anything an executable can do, but your users would actually have to download the program before they could run it.
Depending on what you want the executable to do I might be able to point you in the right direction for a workaround.
-Volkoff007