I\'d like to debug Classic ASP website at Visual Studio 2012 with IIS Express. Hence, I attached the iisexpress.exe in
I like using Full-blown IIS on my dev machine as it's what my web servers run and have had problems with differences between Casini and IIS in the past..
Anyway, I was unable to do it the way that @Kev suggested. I did some more playing around + reading and found that on the "Attach To Process" window, you need to specifically select "Script Code" in the "Attach To:" option.
1) F9 to set breakpoints in code
2) Ctrl-Alt-P to attach to process
3) Next to "Attach To:" click on the "Select" button
4) Select "Script Code"
5) In my case, attach to "w3wp.exe"
Enjoy debugging your code.