Network "Sharing File"?

Hi guys

I recently installed Ubuntu with partion with Vista, and I am enjoying the Ubuntu experience will buy a book and learn this awesome OS, my question is this:

My wife has a laptop that runs Vista, and when i use my Vista she can see my files and I share this hard drive with her, but when i run Ubuntu she cant see this drive, i have extrernal hard drive as my backup with lot of different files on it and she can pull files from it but when i use Ubuntu she can see on her Vista Network, how can i make so when i use Ubuntu she can see my drive? On my Windows i set up sharing of files but how do the same with Ubuntu.

Any help would be great.

Thanks

Hello and welcome!
You need to investigate Samba, it for file/print sharing between Linux and Windows machines.
Samba - opening windows to a wider world
You can install it from your systems package manager and if you need help with Samba, don't be afraid to aks.