ATL COM与MFC

ATL 与 MFC可以混用吗？
我认为可以，你们的意见呢？
ATL COM中我用CDatabases和CRecrodSet访问数据库，在连接的时候出现问题说是DLLMain重复定义，为什么阿？
请指教！Does a good farmer neglect a crop he has planted?
Does a good teacher overlook even the most humble student?
Does a good father allow a single child to starve?
Does a good programmer refuse to maintain his code?
-- Geoffrey James, "The Tao of Programming"