Gets an array of vectors.
HRESULT GetVectorArray( D3DXHANDLE hParameter, D3DXVECTOR4* pVector, UINT Count );
If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be D3DERR_INVALIDCALL.
If the destination vectors are larger than the source vectors, only the initial components of each destination vector will be filled, and the remaining destination vector components will be set to zero.
Header: Declared in D3dx9shader.h.