using a external hard drive as a time capsule

Hello everyone.

I wonder if I can use an external hard disk same way that time capsule works by connecting that disc to another computer (running under windows) and creating a network with both computers.
I'm new in the forum and a weird new mac user ( I bought a mac book 3 years ago and I hated it so deeply, finaly I sold it 3 months later, bad first experience). Now this is the second chance and I'm realy happy with the amazing features that my new mac book pro includes. So, I don't know what happend first time, but I think that mac is more friendly than before for former windows users. I'll appreciate your comments regarding the backup options.

In order to use the Time Machine feature, the disk must be formatted in Mac OS Extended (preferably Journaled).