Samba is installed by default on Linux Mint 13. You didn't mention which desktop environment you are using, but for MATE for example you have Shared Folders in the Administration menu to configure Samba. And you can share a folder with the cleverly disguised option in the right-click menu of your file browser, called "Share Folder" (when you right-click a folder).
Samba is a service, and doesn't have a front-end of its own. You can use one of the options shown to share folders, or you can install a front-end like system-config-samba. This gives you Samba as an entry in the Administration menu, from which you can again configure which folders to share (you already could with the options shown above).
caf4926 wrote:But it's configured by editing the config files
I don't think you will find it in the applications list
Eh? Perhaps look before you answer