The definition of the internal DirectX D3DDRAWPRIMITIVESTRIDEDDATA object is as follows:

struct D3DDRAWPRIMITIVESTRIDEDDATA {
D3DDP_PTRSTRIDE position;
D3DDP_PTRSTRIDE normal;
D3DDP_PTRSTRIDE diffuse;
D3DDP_PTRSTRIDE specular;
D3DDP_PTRSTRIDE textureCoords[D3DDP_MAXTEXCOORD];
};