What Disassembler would I use on a ASP dll?

I've been ta开发者_StackOverflow中文版sked with re-writing an old ASP 3.0 app. But it has some propriertary dll's included. I'm not sure what the dll's were written in or how they were created (Interdev? VB 6?) I tried to disassemble them with Reflector but it only works on .NET dll's. Does anyone know how to disassemble a dll used in an ASP app?

Try running something like PEiD with a good userdb file (exhaustive ones can be found via Google). This should give you an idea the language that was used to create it. If it's VB6, you can find look for decompilers with Google, though I'm not sure how well their output will help you.