Is purchasing ColdFusion necessary

A new customer has asked me to edit/add a couple of things on his ColdFusion-driven site. Normally I do all development in Perl and MySQL, but the host only supports CF and a MS SQL db. I know little about CF.

Question is, can I just hard code CF pages in my editor (BBEdit) and upload them? What does one get when they actually purchase CF?

Thanks.

The software is actually for the server-side. You don't need any special software to program in Cold Fusion. Dreamweaver is what most developers use however

Thanks JodoHost. Figured as much. Now, all I have to do is learn another "language"

CF is a server-side engine based on Java, kind of like PHP except it is a tag-based language instead of script-based. You need to buy CF Server if you are running a server, but for development you can code in any text editor. You can also download and use the free single-user server version for development. It only lets one IP address connect to the server, so you can't run a real site on it, but it works fine for local development.