buildVertexBuffer(void){	// Obtain a pointer to a new vertex buffer.	hr = (gd3dDevice->CreateVertexBuffer(8 * sizeof(VertexPos), D3DUSAGE_WRITEONLY,		0, D3DPOOL_MANAGED, &mVB, 0));       if(FAILED(hr))           do error	// Now lock it to obtain a pointer to its internal data, and write the	// cube's vertex data.	VertexPos* v = 0;	hr = (mVB->Lock(0, 0, (void**)&v, 0));        if(FAILED(hr))           do error	v[0] = VertexPos(-1.0f, -1.0f, -1.0f);	v[1] = VertexPos(-1.0f,  1.0f, -1.0f);	v[2] = VertexPos( 1.0f,  1.0f, -1.0f);	v[3] = VertexPos( 1.0f, -1.0f, -1.0f);	v[4] = VertexPos(-1.0f, -1.0f,  1.0f);	v[5] = VertexPos(-1.0f,  1.0f,  1.0f);	v[6] = VertexPos( 1.0f,  1.0f,  1.0f);	v[7] = VertexPos( 1.0f, -1.0f,  1.0f);	hr = (mVB->Unlock());        if(FAILED(hr))           do error}void buildIndexBuffer(void){	// Obtain a pointer to a new index buffer.	HRESULT hr = (gd3dDevice->CreateIndexBuffer(36 * sizeof(WORD), D3DUSAGE_WRITEONLY,		D3DFMT_INDEX16, D3DPOOL_MANAGED, &mIB, 0));	// Now lock it to obtain a pointer to its internal data, and write the	// cube's index data.	WORD* k = 0;	HR(mIB->Lock(0, 0, (void**)&k, 0));	// Front face.	k[0] = 0; k[1] = 1; k[2] = 2;	k[3] = 0; k[4] = 2; k[5] = 3;	// Back face.	k[6] = 4; k[7]  = 6; k[8]  = 5;	k[9] = 4; k[10] = 7; k[11] = 6;	// Left face.	k[12] = 4; k[13] = 5; k[14] = 1;	k[15] = 4; k[16] = 1; k[17] = 0;	// Right face.	k[18] = 3; k[19] = 2; k[20] = 6;	k[21] = 3; k[22] = 6; k[23] = 7;	// Top face.	k[24] = 1; k[25] = 5; k[26] = 6;	k[27] = 1; k[28] = 6; k[29] = 2;	// Bottom face.	k[30] = 4; k[31] = 0; k[32] = 3;	k[33] = 4; k[34] = 3; k[35] = 7;	hr = (mIB->Unlock());        if(FAILED(hr))            do error stuff}