Sets an array of 4D vectors.
HRESULT SetVectorArray( D3DXHANDLE hConstant, CONST 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.
Header: Declared in D3dx9shader.h.