Retrieves the per-vertex attribute weights used to create the ID3DXSPMesh object.
HRESULT GetVertexAttributeWeights( LPD3DXATTRIBUTEWEIGHTS pVertexAttributeWeights );
If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be one of the following: D3DERR_INVALIDCALL, E_OUTOFMEMORY.
Header: Declared in D3dx9mesh.h.