Hello, I am confused how I can redirect a incoming request to a file present in the memory in ISAPI Filters. I can access the file only through file pointers which are created on fly. For .e.g, when a request comes as http://www.abc.com/Testing, then my filter should fetch me the index.asp present in...

I want to know if the physical file for a particular url exists on my web site. If the file exists physically then I want to allow it to continue on it's way untouched. If not I want to send the request to my .net handler for processing as an alias (I'll add .aspx to the url somewhere to force...