I would like to create a "production" web service.

[gregory_may]

I have a licensing application I would like "productionalize" as a web
service. Currently, the user types in a "Key" & the application spits out
an XML file containing the licensing information.

I am curious if anyone could recommend any particular resource that could
help me with:
* A walk through the of IIS setup ... including any security I may need to
implement.
* The best way to set up the message between the "Client" & "Server". Its
probably best if I use an XML message, but I dont care what the message
format is .... as long as its simple to work with.
* How best to hook into Asp.Net? to implement my already completed C# code.

Thanks!