Unless your dreamweaver is different than mine, all you have
to do is open one file to get Find to search any directory you
want. You have to look at every option in the dialogue box.
Regarding the windows search, I duplicated your efforts and
got unexpected results. Searching for the string cfquery on our
development server yielded files with txt, pdf, xls, and xml file
extensions, but not cfm or cfc. Maybe there is something you can
adjust in Windows, I don't know.