Need Help! Wanna print from Macbook

Good Day,
I am new to Networking so i need some real help. I have a mac book as well as i have a printer connected to my desktop (Windows XP). I wanna print from my Macbook from my room upstairs but my printer is connected to my desktop downstairs. Can i print from my room through my mac book. Is it possible? if so please help.

Thanks,
Ali