Directx Sound Card How Do I Know If My Vista Has A DirectX 9.0c Compatible Graphics Card And DirectX 8.1 Compatible Sound Card?

How do I know if my Vista has a DirectX 9.0c compatible graphics card and DirectX 8.1 compatible sound card? - directx sound card

I think Neverwinter Nights 2 buy, but it seems that the game requires a DirectX 9.0c compatible video card and DirectX 8.1-compatible sound card. I have no idea whether I have it. How do I find?