I'm teaching myself DirectX 9.0, and right now I'm trying to figure out how to use it to multiply all the vectors* in a buffer by a rotation matrix with a single function call. I cannot find a ...

And not version b, like from the http://www.microsoft.com/directx/? Every single time I have tried to install 9.0b, and when I updated from 9.0 to 9.0b, directx ...