Entering Chinese Characters

Hi,

I use Windos XP/Office XP and try to enter some Chinese characters into a Word document. When typing WO, instead of seeing a list of Chinese characters, I see only the pinyin of WO, press the Enter key or the Space bar or the number keys I can get a Chinese character but not the one I want.

How can I see a list of Chinese characters when typing in pinyin?

Please advise. Thanks.