How to create shares on Windows Servers accessible by Mac and Windows

A Mac computer was added to our existing network which consists of a Windows Server 2003 Domain Controller and File Server. There are existing shares on this server which is already accessible to our current users. I want these shares to be accessible to the user of the Mac computer. I tried browsing to the file server but cannot see these folders. What do i need to do to make these folders visible on the Mac computer.
The user needs to be able to read and edit documents in these folders. I also want to create new shares which should also be visible to both the windows users and the mac user. I also have a printer connected to the mac computer which i would like to share for the windows users. Is that also possible?
